Many things can contribute to a lean condition as noted above, but two other possible causes not mentioned are. Singles have a tendency to pop and putter on deceleration. exhaust popping at idle. Mar 13, 2010 · Discussion Starter · #1 · Mar 13, 2010. STEP 6: WORN OR SHORTED SPARK. This introduces an imbalance in the exhaust system and leads to more backfiring. Plugs were changed about 3 months ago. I have a steady -15inHg at idle measured at the back of the plenum - is this in the normal range? I've found a couple of leaks: split pipe leading to climate controls)and am in the process of changing the. Do any RX-8 users notice their car ideling rough after a warm up. Oct 30, 2009 · I have a 1997 Thunderbird 900. I had the ramair already but after I put these pipes on the popping started. It's like above 2500 RPM. Looking for some advice on exhaust. Now if the car sounds like a real slight miss or pop at idle, it could be a burnt exhaust valve or an exhaust valve not fully seating and seal properly. Put the vacuum advance hose on the non-emission port. (It burns the throttle body cleaner out with white smoke after cleaning, so I don't think the cats are blocked) Mileage is still in the 28-30 range in the city. 5:1 makes the idle a little smoother without these pops. Sometimes the popping is worse than other times, but it always happens when the car is warmed up. Every time I've had a popping sound when the engine is at idle, it has always been a leaky exhaust gasket. It sounds like the pop noise you make with your tongue on the roof of your mouth. The car is completely stock. Now if the car sounds like a real slight miss or pop at idle, it could be a burnt exhaust valve or an exhaust valve not fully seating and seal properly. It sounds like it has one of those 3 cylinder Chevy Metro engines in it. need help with exhaust popping at idle. Singles have a tendency to pop and putter on deceleration. Exhaust leaks can cause decel pop, make sure the exhaust is sealed completely at the motor, and at any other connections. Jul 29, 2008. December 19th, 2011, 8:03 pm. Car starts up and idles good when cold and starts to pop after a minute or so. 6L Tech' started by Torch Red GT, Dec 13, 2009. I am running 60 idle jets 32mm Venturis, 145 main jets. I have a small video I'll post it as soon as I get to work. Great bike, got a jetkit, K&N airfilter, and cam. Also vacuum advance is on full manifold and set to 8-10 degrees. Drives good on the highway and around town, but when at a stop the car shakes slightly when the popping happens. Read also: How to Quiet Exhaust Without Losing Performance. 2:1 compression roughly. On mine I have the mixture screws out about 3 1/2 turns, and it still pops on decel. Im not sure if i need to be concerned or not so help me out. a free flowing (performance) exhaust. made available for personal non-commercial projects. Getting the engine up to 2100 rpm required coaxing of the gas pedal. Symptoms: ragged exhaust note, unstable idle, low rpm surging, lots of decel popping and popping between shifts, low speed stuttering when warmed up in heavy traffic Fix: Tightened rear pipe to head. '65 Coupe, 302, Autolite 4100, C4, 3. Now it has increased in frequency. Usually at start-up it is loudest, and this may even cause a misfire condition on a particular cylinder. when the car (90 tt) is @ idle i will notice a quiet pop from my exhuast (greddy evo) and it is only at idle. 0 running Weber 40's Runs smooth pulls strong. Jul 23, 2021 · Loud Engine noise at idle L-Series Tech. What causes popping sound in exhaust at idle? Now if the car sounds like a real slight miss or pop at idle, it could be a burnt exhaust valve or an exhaust valve not fully seating and seal properly. From what I've read, the popping is unburnt fuel combusting in the exhaust pipes so I'm left with the following assumptions: Leaking injector, too much fuel getting in the cyclinder and getting blown out with the exhaust. I’ve heard many complaints from customers, in person and online, about a ticking-type noise coming from the engine on their Chevrolet Silverado. What would cause a random pop sound in mufflers, sorta like backfire Idle or even at times on deceleration. Jul 07, 2009 · Dec 14, 2008. An exhaust leak will let air enter the exhaust under deceleration and cause a "popping" sound. If you have found a clunking sound at the bottom of the engine, you will need to confirm it and locate the cylinder. All kinds of automobile sounds. It almost sounds like a compression stroke that isn't igniting and backflowing through the intake. I have a 2016 STi with the stock exhaust, no power/engine mods. My old SRT-4 did this at idle also. Since I have purchased the truck I have noticed popping sound which I can best describe as sounding like popping popcorn. Joined Oct 27, 2007. You are trying to decarbonize the combustion chambers. Recently out of nowhere, my car started to make make multiple popping noises from what sounds like the. Re: Smooth Idle, but popping/Clicking noise. The Italian tuneup. #12 · Mar 26, 2016. Its a newly built black efi 202 at 30thou with a m90 supercharger. Many people like to modify their bikes with a new exhaust for better performance or sound BUT this comes at a risk. Even the Corsa (which I have on my V) pops a little when the engine is cold, but it isn't bad. Jun 09, 2009 · A few days ago I started to develop a slightly rough idle and a decent hesitation upon acceleration from idle to 2000 RPM. Getting the engine up to 2100 rpm required coaxing of the gas pedal. I recorded a video of what I'm experiencing below and a list of. com/heat-hammer-hoodie. Many things can contribute to a lean condition as noted above, but two other possible causes not mentioned are. Show example Subaru Forester Clicking or popping sound is coming from wheels Inspection prices. - posted in Engine: Gday guys, I need some help. This introduces an imbalance in the exhaust system and leads to more backfiring. More power, louder, and some sputting and popping. There is a couple fasteners that hold a plate on the back of the intake/IACV area. If I remeber correctly. It runs great however it was idling at 2000 rpms. Aug 14, 2021 · The V8-engined Hellcat chugs menacingly at idle, then makes a noise like a hive full of angry bees. If you suddenly hear a loud pop or bang in the engine area, pull over to the side of the road and check it out. just over 3000. Harley-Davidson: 1. I’ve heard many complaints from customers, in person and online, about a ticking-type noise coming from the engine on their Chevrolet Silverado. Jul 14, 2012 · At idle, a very audible popping noise can be heard now and then, which I took as the muffler. # 4 intake valve was very tight. com/heat-hammer-hoodie. You are trying to decarbonize the combustion chambers. The sound and movement are totally regular and follow a set time around half a second apart. Car makes popping noise from exhaust at idle Discussion in '2005+ Mustang GT 4. I'm not sure what you mean with the valve popping sound. 60% Upvoted. I checked timing at 12 init and 33 all in. (It burns the throttle body cleaner out with white smoke after cleaning, so I don't think the cats are blocked) Mileage is still in the 28-30 range in the city. Also I was thinking the OFV was bad or pump timing is wrong. rough idle with popping coming from exhaust: metalworm: 4. Any help would be greatly appreciated. After running vacuum advance on manifold vac, there is occasional popping coming from the exhaust. This is usually caused by your engine running too lean or too rich. will take more when its hot and idling and also in the engine bay. However, I did notice that If I thump the throttle the exhaust is black, which would be consistent with running too rich. The popping sound isn't all that regular (as in every 1 second). now; I`m getting pops (lots of) /backfire, and idle rpm is not stable. It almost sounds like a compression stroke that isn't igniting and backflowing through the intake. But when it happens on decel its usually caused by a lean condition. 5k but smoothes out and has good power after that. Exhaust Popping on Deceleration. If you find out the answer, please let me know. So, the question is; “Does it pop out the exhaust during deceleration with a closed throttle from high rpm to idle, while in 4th gear or above?” 2) Midrange performance A) A lean condition in the midrange is somewhat hard to diagnose. So I have just completed a 2jz gte vvti swap into a 240sx, I started the car for the first time today and after some working with Haltech support (The car is on a Haltech standalone) The car runs and idles perfectly, aside from a popping sound coming from the exhaust at idle. " So, i think this could be corrected by fine tuning. Dec 13, 2009 #1. There is a little bit of a shudder when coming off of idle slowly until about 1500 rpm. If I slowly climb the. I'd be interested in knowing the rpm rise when the engine is shut down at idle (600-700 rpm) by moving the mixture control lever slowly to the idle cut-off position. Sometimes the popping is worse than other times, but it always happens when the car is warmed up. The biggest single giveaway is the sound of the engine. It is pretty noticeable and I can't figure out what it is. Apr 30, 2010 · Water leaking from the exhaust pipe is usually nothing unless it’s coupled with other stranger malfunctions, and the brief circumstances under which you see water dripping from the exhaust are likely negligible. Sounds like unburnt fuel coming out. When you suddenly close the throttle, the incoming air is choked off and the closed throttle also causes the bike to return to idle on the very lean idle circuit. Basicly, I have limited power, off idle stumble, and a slight pop out of the exhaust when shifting. Popping tells me a miss coming from either ignition or fuel. A little nit of popping will happen and with the aftermarket exhaust, you can hear it more than with the stock. At idle, the engine runs fine. Exhaust leaks can cause decel pop, make sure the exhaust is sealed completely at the motor, and at any other connections. It did it with the sock exhaust and with a borla cat back. In any case the popping does not incicate an overly lean condition in the running range. I recorded a video of what I'm experiencing below and a list of. I checked timing at 12 init and 33 all in. Hesitation is gone, and engine revs up fine. Popping in the exhaust can be from unburnt fuel re-igniting in the exhaust, but unfortunately, not to be that guy to correct someone or sound arrogant, but there can be multiple reasons for exhaust popping. I've always suspected that maybe my header exhaust gasket has a small leak on the passanger side, but im not positive. It is pretty noticeable and I can't figure out what it is. Question: “What causes the popping sound in the exhaust of some high performance automobiles?” What you are describing as a “popping sound” is probably the opening of the turbocharger waste gate which is controlled by turbo’s the blow off valve an. aftermarket headers, o/r midpipes, quality catbacks, all cause light 'popping'. On mine I have the mixture screws out about 3 1/2 turns, and it still pops on decel. It is also probably a bit lean, but nothing lifethreatening. My 71 now is popping (misfiring) a lot at idle and also on deceleration (popping). Harley-Davidson: 1. A blown exhaust gasket can cause some pretty loud sounds from that area, but it will always be louder and faster as you rev the engine higher. Worse when cruising usually. Still have the popping noise under the car. Be sure that your carburetor's pilot jet is the correct size and that the idle air mixture screw is correctly adjusted before looking for other causes of popping. Also vacuum advance is on full manifold and set to 8-10 degrees. SmokeStang08 · Registered. The popping is a result of the air/fuel mixture becoming very lean when the throttle is closed and the engine is rotating well above idle speed. Seems to disappear with throttle. Popping through the exhaust could either be raw fuel loading up in your exhaust (more like a boom), or a lean miss. The less restricted the exhaust, the more popping usually. It doesn't happen if I let the motor cool down on my 1996 zrt 600. So WrekkeD, you were right in that the fuel pump was shot, thank you. I once had a collector weld crack on a set of shorties and it sounded altogether like a bad lifter, once revved up the sound went away. Singles have a tendency to pop and putter on deceleration. If you suddenly hear a loud pop or bang in the engine area, pull over to the side of the road and check it out. 9 Cummins Loud Engine Noise at idle - YouTube Diesel Engines and Noise. My mufflers are empty. During warmup period as drop from fast idle to normal runs rough @ 900 RPM for about 30 seconds then returns to 1000 RPM. With the engine running at idle, use the insulated plug wire pliers to remove one plug wire at a time at the spark plug location. But this popping was like an old timey steam engine hitting - in time with the normal rattle of a good diesel engine. From what I've read, the popping is unburnt fuel combusting in the exhaust pipes so I'm left with the following assumptions: Leaking injector, too much fuel getting in the cyclinder and getting blown out with the exhaust. Poppn · Registered. I've got a popping sound coming from the exhaust (I think) happens always at idle and all the time. With the engine running at idle, use the insulated plug wire pliers to remove one plug wire at a time at the spark plug location. Jun 17, 2016 · The starter valves must be tuned or at idle there could be rich and lean cylinders which could cause popping in addition to a lumpy idle and difficulty starting. It's random, not rhythmic. You can use a laser thermometer on the different pipes coming out of the engine. Then, when I start the car when it's cold, the idle is weird. A Popping Sound Comes Out the Tailpipe in My Car. popping while accel/decel is a normal part of having low backpressure. Aug 14, 2021 · The V8-engined Hellcat chugs menacingly at idle, then makes a noise like a hive full of angry bees. Harley-Davidson: 1. I checked the valve clearances and they were very tight. Occasionally if I sit with my car idling the engine (?) will start making a random popping noise, kind of like the timing of popcorn popping - it's not consistent. Re: Smooth Idle, but popping/Clicking noise. The stock muffler on a motorcycle is specifically designed to ensure the motorcycles engine runs the way it is supposed to. My old SRT-4 did this at idle also. Went back to park it and let it idle. Firing order double checked. It almost sounds like a compression stroke that isn't igniting and backflowing through the intake. Chief915 said: I was out towing with the subruban last night, everything went great. Vac modulator is disconnected as that is where my vacuum gauge is connected. Here's a video walking you though everything I've done so far and showing the popping sound at idle. No smoke no rough idle no power loss no hard starting and fuel mileage is fine. Exhaust Popping on Deceleration. Try a size up pilot and down and adjust the screw again with the different jets. The engine has a Edlebrock 1406 Performer Carb, 600 cfm, four barrel. You should be able to disconnect the collector all together and the engine should run without popping. Popping through the exhaust could either be raw fuel loading up in your exhaust (more like a boom), or a lean miss. If you suddenly hear a loud pop or bang in the engine area, pull over to the side of the road and check it out. Car makes popping noise from exhaust at idle Discussion in '2005+ Mustang GT 4. Mar 29, 2021 · A failed converter may cause a rotten-egg smell coming from the exhaust pipe, and it can also cause dark exhaust smoke. Joined Apr 13, 2010. Maybe the difference is puffing vs popping? It was a pathetic little noise but definitely not correct. Went back to park it and let it idle. Chief915 said: I was out towing with the subruban last night, everything went great. '79 CX500 // I'm having an issue where my exhaust is popping at idle and was before and is now still happening after a thorough carb cleaning and tune. Almost as if it can't take in the air it wants to and forces it back out the filter. Today while at a drive through i. -Changed Idle Air Control Valve. With the engine running at idle, use the insulated plug wire pliers to remove one plug wire at a time at the spark plug location. A blown exhaust gasket can cause some pretty loud sounds from that area, but it will always be louder and faster as you rev the engine higher. I've always suspected that maybe my header exhaust gasket has a small leak on the passanger side, but im not positive. Now if the car sounds like a real slight miss or pop at idle, it could be a burnt exhaust valve or an exhaust valve not fully seating and seal properly. Idle will drop when you found it. Discussion Starter · #4 · Jan 25, 2018. Drives good on the highway and around town, but when at a stop the car shakes slightly when the popping happens. Popping in the exhaust can be from unburnt fuel re-igniting in the exhaust, but unfortunately, not to be that guy to correct someone or sound arrogant, but there can be multiple reasons for exhaust popping. My exhaust goes from a 3 inch to a 4inch halfway down the truck. One of the most common exhaust problems is a rattling sound. No loss of power while driving. This is usually caused by your engine running too lean or too rich. 5:1 makes the idle a little smoother without these pops. Its just the fact that you have boomtubes and you can hear the normal exhaust noise better since the exhaust is less restrictive. However, loud backfiring or popping on decel that has not been decreased by this mod is likely an indication of an exhaust leak. Spam Sucks. I am confident that aftermarket solutions are capable of. So, the question is; “Does it pop out the exhaust during deceleration with a closed throttle from high rpm to idle, while in 4th gear or above?” 2) Midrange performance A) A lean condition in the midrange is somewhat hard to diagnose. If I slowly climb the. Fuel is being ignited before the exhaust valve is seated. What started as popping on. Popping tells me a miss coming from either ignition or fuel. Maybe I'm nutz, but try backing it down a couple of degrees and see if it makes a difference. Aug 20, 2016 · I have had a popping noise from the exhaust at idle for a while which is kind of annoying and am currently chasing down vacuum leaks. 1 - 20 of 67 Posts. May 17, 2010 · The 50 Series Delta Flow produces a very distinctive, throaty sound at higher RPM, much as one would expect from a Flowmaster muffler. truck ran fine and sounded good under load. I am OK with the stock sound level, no drone to my ears, but would love to have more snap, crackle and pop from my exhaust note. It’s not unusual, especially on some Continental engines, for this popping to occur during that scenario. 9 Cummins Loud Engine Noise at idle - YouTube Diesel Engines and Noise. Like someone said, increase the idle just a touch, richen the mixture a little or both should make it go away or be much less prevalent. Have you checked your spark plugs?. It's not very loud. Posted: Fri Oct 07, 2011 5:59 pm Post subject: DCNF Idle/Exhaust Popping Frustration: My Berg Special 42 DCNF's are becoming increasingly temperamental and causing idle and popping problems (through the exhaust). He may have to adjust the idle screw at this point to bring it to the range mentioned earlier. Regardless, it has drove fine for a couple thousand miles. Sometimes, an exhaust system clamp gets loose, creating a rattle. Question: "What causes the popping sound in the exhaust of some high performance automobiles?" What you are describing as a "popping sound" is probably the opening of the turbocharger waste gate which is controlled by turbo's the blow off valve an. (re adjust your idle mixture) Retarded spark timing. A Popping Sound Comes Out the Tailpipe in My Car. Hooked everything back up and drove over 100 miles. I dont understand how adjusting the idle made this happen- it always had a little pop before but now it is quite bad. Apr 30, 2010 · Water leaking from the exhaust pipe is usually nothing unless it’s coupled with other stranger malfunctions, and the brief circumstances under which you see water dripping from the exhaust are likely negligible. Last couple of months it began popping from the exhuast intermittently at hot idle. I once had a collector weld crack on a set of shorties and it sounded altogether like a bad lifter, once revved up the sound went away. The noise is most prominate at the driver side wheel well. At -45 degrees Fahrenheit, only 20 percent of the fuel. I put new spark plugs and wires in and it still did it. I cleaned it and threw it on. It is most prevalent in drive-thrus, at idle, and I can only hear it when the windows are down or when I am standing outside while the truck is at idle. If you get onto an over lean cammed engine and rap the throttle it will blow black smoke. I've attached a datalog and Config File. Why is there supposedly a rich condition when I took my foot off the gas?. With the engine running at idle, use the insulated plug wire pliers to remove one plug wire at a time at the spark plug location. I dont understand how adjusting the idle made this happen- it always had a little pop before but now it is quite bad. Runs great, plenty of power, but at idle only still have a popping noise. It probably won't cause to much of a problem for now, but could cause some damage down the road. 1 - 20 of 67 Posts. I'm not sure if that is officially called "missing" or not. After running vacuum advance on manifold vac, there is occasional popping coming from the exhaust. From what I've read, the popping is unburnt fuel combusting in the exhaust pipes so I'm left with the following assumptions: Leaking injector, too much fuel getting in the cyclinder and getting blown out with the exhaust. The popping is noticeable at about 3 to 3500 rpm's when cursing along in 4th or 5th gear. Shop/Dealer Price. Free car sounds available to download in WAV and MP3 formats. This causes an overrun, that is, the motor's rpm is turning faster than the fuel provided can support, so the motor begins to spool down. The noise only happens at idle speed, as soon as you touch the accelerator it goes away completely. When an engine pops through the exhaust only at idle or upon full deacceleration, I first suspect that the idle mixture is too lean. The sound and movement are totally regular and follow a set time around half a second apart. '65 Coupe, 302, Autolite 4100, C4, 3. bike- 81, 47. Loud exhaust. It sounds like it's coming from the catalytic convertor. It’s not unusual, especially on some Continental engines, for this popping to occur during that scenario. Today while at a drive through i. I have 100 miles on the car, I have the "mild" cam setting loaded and the only changes I have made to my setup are the base timing and getting the IAC % down when engine is warmed up. Regardless, it has drove fine for a couple thousand miles. It could be relatively quiet on a stock engine and loud on a modified one. I am slowly working the bugs out of a new cam and head swap. Great bike, got a jetkit, K&N airfilter, and cam. My old '81 D150 with a stock 318 sounded awesome and wasn't really all that loud with dual 2 1/4" exhaust and a pair of Super Dynomax mufflers, more like a nice deep roar. #12 · Mar 26, 2016. added a digital voltmeter this summer. The popping sound is unburned fuel getting past the exhaust valves and exploding in the hot exhaust pipes. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators. Recently out of nowhere, my car started to make make multiple popping noises from what sounds like the. A Popping Sound Comes Out the Tailpipe in My Car. Hesitation is gone, and engine revs up fine. It did it with the sock exhaust and with a borla cat back. Also there is a process called a hot soak where after the IT, you pull the plugs and pour solvent into the. The popping is in the exhaust not the engine. The less restricted the exhaust, the more popping usually. Click to expand Call it popping , clicking , ticking , whatever you want. I picked up a R53 2006 Cooper S this weekend, its my first mini since owning a 1275GT in the late '80's - the second best sound it makes is the popping and crackling on deceleration and downshifting, the best noise is the sound of the Supercharger!!! I have to admit to sitting in the underground car park at work. Car makes popping noise from exhaust at idle. It is popping when standing still in idle and also backfiring once in a while and sometimes load. It sounds like it's coming from the catalytic convertor. #2 · Apr 29, 2009 (Edited) You've created a home-brew exhaust system with all it's inherent characteristics. mine idles. During warmup period as drop from fast idle to normal runs rough @ 900 RPM for about 30 seconds then returns to 1000 RPM. A blown exhaust gasket can cause some pretty loud sounds from that area, but it will always be louder and faster as you rev the engine higher. Subsequently, question is, what causes popping sound in exhaust at idle? Now if the car sounds like a real slight miss or pop at idle, it could be a burnt exhaust valve or an exhaust valve not fully seating and seal properly. hi everyone. Jul 29, 2008. Aug 14, 2021 · The V8-engined Hellcat chugs menacingly at idle, then makes a noise like a hive full of angry bees. Ok im stumped. What started as popping on deceleration is now almost constant and getting worse by the day. I also hope I can give you enough information to help you guys make an educated guess. This time it started popping a lot every time the throttle was shut. The idle makes the whole car wobble backwards and forwards in time with the engine, at the same time as the engine is moving the exhaust is making a hollow popping noise like pop-pop-pop-pop-pop. When I am at cruise and am light on the accelerator between 3000-4000rpm, I get an intermittent popping and "tweeting" sound through the exhaust (not through carbs). Most times it runs absolutely fine. i have had a popping sound at idle since new and recently i noticed that when i turn the bike off it has smoke coming out of the right side exhaust when i turn the bike of and it sits. Question: “What causes the popping sound in the exhaust of some high performance automobiles?” What you are describing as a “popping sound” is probably the opening of the turbocharger waste gate which is controlled by turbo’s the blow off valve an. Jan 23, 2005 · my RX8 has rough idle (popping in exhaust) unworth8s. With the engine running at idle, use the insulated plug wire pliers to remove one plug wire at a time at the spark plug location. It will happen after a car has accelerated hard, and as the throttle is let off and the revs decrease. Drives good on the highway and around town, but when at a stop the car shakes slightly when the popping happens. Harley-Davidson: 1. HEAT & HAMMER MERCH https://www. It's a popping noise coming from the exhaust at idle, almost like a skip or misfire. The noise seems to be rotational, usually about half the speed of the crankshaft. I have a 1300c with Vance and Hines exhaust it has the jets changed by a shop. The engine has a Edlebrock 1406 Performer Carb, 600 cfm, four barrel. Be sure that your carburetor's pilot jet is the correct size and that the idle air mixture screw is correctly adjusted before looking for other causes of popping. The less restricted the exhaust, the more popping usually. A rhythmic popping sound which is not as prominent as lean under power backfires. Almost as if it can't take in the air it wants to and forces it back out the filter. When enough of the gas builds up there, it will ignite. it would also do it when i was on a decel while driving (engine under no load). get the codes checked 2000 tacoma with 3in suspension lift, 3in body lift, 35in bfg all terrains, rancho rs9000x shocks, in cab controler for shocks, tjm front bumper, hella 500 driving lights, powertrax lock right in the rear, and arb safari snorkel. You probably don't hear it under power because the only time the engine is going to rock both ways is on startup. Last couple of months it began popping from the exhuast intermittently at hot idle. Second video is from this morning cold start and let me know if you guys can here the bubbling/ popping sound from the exhaust. Also developed a popping sound from the exhaust at idle. A Popping Sound Comes Out the Tailpipe in My Car. Is the popping noise the sound of fuel igniting in the exhaust that didn't combust in the engine? It can happen when snapping the throttle off, or if your fuel mixture is just plain too rich, or you have removed/bypassed some emissions controls. 0 and 2004 mystichrome cobra), Anyways it also makes a popping sound which my mechanic says is a LEAN MISFIRE, so i got some suggestions here and the main consensus was too replace the EGR and the TPS sensor, anyone else have any. Sent from the Death Star. Apr 14, 1999. Like someone said, increase the idle just a touch, richen the mixture a little or both should make it go away or be much less prevalent. (advance base timing). Firing order double checked. I was going to replace the ragged sounding Hookers with Monster Ovals. If I remeber correctly. When you let off the throttle, the carb with the throttle closed most runs lean, and it will pop on the exhaust. If you have found a clunking sound at the bottom of the engine, you will need to confirm it and locate the cylinder. Subsequently, question is, what causes popping sound in exhaust at idle? Now if the car sounds like a real slight miss or pop at idle, it could be a burnt exhaust valve or an exhaust valve not fully seating and seal properly. I got a 2001 v6 manual, with dual exhausts. The popping is usually from over lean because thats when you have oxygen in the exhaust and it can wait until the AFR is burnable in the exhaust and then you get a little pop. Exhaust is 3" pipe to 1 chamber flowmasters dumped before rear axle. There is a couple fasteners that hold a plate on the back of the intake/IACV area. Even the Corsa (which I have on my V) pops a little when the engine is cold, but it isn't bad. The Italian tuneup. Regardless, it has drove fine for a couple thousand miles. If an idle mixture screw has no effect when turning it then internal passages inside the carb are clogged. #20 · Jan 24, 2012. My doubts are that there's a burnt valve. 5:1 makes the idle a little smoother without these pops. Discussion Starter · #1 · Feb 3, 2009. Location: Long Island,New York. Fixed all that. I took it this morning to an exhaust shop and they put it on a lift and before lifting he said look at the hood see how its "jumping" and every here and then it like jumped alittle. Cheers Greg Locock. Turning on A/C (once warm) drops RPMs about 100 and seems to lessen popping sound. It is popping when standing still in idle and also backfiring once in a while and sometimes load. It sounds like it has one of those 3 cylinder Chevy Metro engines in it. Fuel goes out the exhaust. Oct 09, 2010 · Revs fine (even from idle at 1,500 RPM) Idles at ~2,000 RPM with no problem - no popping If I let it drop below to ~1,500 RPM she randomly starts to pop out exhaust (both sides) Also noticed, when I put a timing light on it, at idle the timing seems to bounce around - once I rev it the timing mark becomes steady. The sound stops after a few minutes. Dec 30, 2008 · Joined Mar 15, 2002. My 71 now is popping (misfiring) a lot at idle and also on deceleration (popping). got to work right on time but ill sneak a way later. Also I was thinking the OFV was bad or pump timing is wrong. More power, louder, and some sputting and popping. If I remeber correctly. 2 1/2 turns was too rich tho so I turned them down to 2 turns out each corner - Now the. Dec 30, 2011 · Re: im having a popping noise coming from exhaust. 0 running Weber 40's Runs smooth pulls strong. I'm suspecting it might be a leak at the intake manifold, but i'm not sure, the motor surges. You probably don't hear it under power because the only time the engine is going to rock both ways is on startup. It is popping when standing still in idle and also backfiring once in a while and sometimes load. You can't hear it standing outside the car, but its audible from within the car. Jan 04, 2014 · Popping sound and little flames/explosions from exhaust pipe - EFI and carburettor engines - same conditions as before: It's said to be due to lean mix. Just bought a new vehicle. So I have just completed a 2jz gte vvti swap into a 240sx, I started the car for the first time today and after some working with Haltech support (The car is on a Haltech standalone) The car runs and idles perfectly, aside from a popping sound coming from the exhaust at idle. I got a 2001 v6 manual, with dual exhausts. This causes a couple of things to happen. Question: “What causes the popping sound in the exhaust of some high performance automobiles?” What you are describing as a “popping sound” is probably the opening of the turbocharger waste gate which is controlled by turbo’s the blow off valve an. 5:1 makes the idle a little smoother without these pops. If you're all good there, I would go up a couple more primary jet sizes and see if it gets any better. The last 2 weeks after driving the car for 10-15mins with a few WOT pulls as I'm at the traffic lights I hear popping noises coming from my exhaust and as I look at my tacho with every pop I hear my idle drops from 700 to 600 - 550 then jumps straight up again to 700. But does this mean the only vehicles that contain motors which give off a popping noise are those without mufflers? No, quite simply because most of the noise a motor puts out into a stock exhaust is muffled and cancelled out by the time it reaches our ears. Getting the engine up to 2100 rpm required coaxing of the gas pedal. Well, the car sounds like a pop. My 71 now is popping (misfiring) a lot at idle and also on deceleration (popping). This time it started popping a lot every time the throttle was shut. Re: Popping noise in exhaust in idle « Reply #9 on: October 16, 2017, 04:02:18 pm » I would leave the factory airbox in place until you've got to the bottom of the rough idle first, and get rid of that after market dump valve and put the OEM one back on. I also hope I can give you enough information to help you guys make an educated guess. At a low idle (700rpm) my oil pressure is around 24#. It goes away above 2000 rpm. Popping/Puffing Noise from Exhaust of K1500: Sign In Hey guys. At -45 degrees Fahrenheit, only 20 percent of the fuel. It is like the loudest possible pop you would hear on decel. It is pretty noticeable and I can't figure out what it is. Now I have a what sounds like a continuous popping through the exhaust at idle. In most cases, this sound is similar to rattling steel inside of a cage or clanking metal. Standing at the engine it sounds good but it just pops out of the exhaust. I took it this morning to an exhaust shop and they put it on a lift and before lifting he said look at the hood see how its "jumping" and every here and then it like jumped alittle. My 302 makes soft exhaust pops at idle if I advance the initial timing too far (but not far enough to ping). Took it to a friend at Meineke and was fixed up in 15 min. When idling, a distinctive stumble is heard and throttle response. It sounds like pre detination so dieled. If the exhaust muffler an/or pipe isn't partially restricted, and the engine appears to run well at higher RPM, you may consider a lean. Exhaust popping because of a rich condition when you decelerate can happen from either a lean or a rich condition. I have a 2003 sv1000s with hardly any miles. i have had a popping sound at idle since new and recently i noticed that when i turn the bike off it has smoke coming out of the right side exhaust when i turn the bike of and it sits. All kinds of automobile sounds. Free car sounds available to download in WAV and MP3 formats. this time while driving shifting from 2nd to 3rd only it was a popping sound like my exhaust shifted. I replaced my glasspacks thinking the baffle was loose inside and put on some spintech sportsman streets dumped before axle. Local Time: 5:28 AM. However, loud backfiring or popping on decel that has not been decreased by this mod is likely an indication of an exhaust leak. I'm not sure if that is officially called "missing" or not. On mine I have the mixture screws out about 3 1/2 turns, and it still pops on decel. #2 · Apr 29, 2009 (Edited) You've created a home-brew exhaust system with all it's inherent characteristics. Over the past few days there is a loud random exhaust pop at light steady throttle, light load such as driving slowly through a parking lot. Its just the fact that you have boomtubes and you can hear the normal exhaust noise better since the exhaust is less restrictive. I've always suspected that maybe my header exhaust gasket has a small leak on the passanger side, but im not positive. The rattling sound from the engine would, however, improve above 1500 rpm. #20 · Feb 19, 2014. The engine has a Edlebrock 1406 Performer Carb, 600 cfm, four barrel. I'm hoping you guys could help me out. Car starts up and idles good when cold and starts to pop after a minute or so. I have 100 miles on the car, I have the "mild" cam setting loaded and the only changes I have made to my setup are the base timing and getting the IAC % down when engine is warmed up. My engine is popping through the exhaust at idle. I got a 2001 v6 manual, with dual exhausts. Hey guys, I've been having a problem with my '68 camaro. 07" and exhaust at. Question: “What causes the popping sound in the exhaust of some high performance automobiles?” What you are describing as a “popping sound” is probably the opening of the turbocharger waste gate which is controlled by turbo’s the blow off valve an. How fast and how far is the needle swinging? Could be a burned exhaust valve, broken valve spring, sticking valve. Apr 30, 2010 · Water leaking from the exhaust pipe is usually nothing unless it’s coupled with other stranger malfunctions, and the brief circumstances under which you see water dripping from the exhaust are likely negligible. Re: Popping noise in exhaust in idle « Reply #9 on: October 16, 2017, 04:02:18 pm » I would leave the factory airbox in place until you've got to the bottom of the rough idle first, and get rid of that after market dump valve and put the OEM one back on. Pop comes from the right exhaust (which flows from exhaust 1+4, not stock pipes, came from a different model KZ650). Also vacuum advance is on full manifold and set to 8-10 degrees. Joined Jan 25, 2007 · 152 Posts. I bought the boat/motor last July. If you suddenly hear a loud pop or bang in the engine area, pull over to the side of the road and check it out. will take more when its hot and idling and also in the engine bay. The reason you get popping is because of the air that is added to the system via the P. I checked timing at 12 init and 33 all in. 5m, canadian needles and jets, uni's, shorty exhaust, pamco background- bike has ran well so far this summer (and past several summers for that matter). Drives good on the highway and around town, but when at a stop the car shakes slightly when the popping happens. 9 Cummins Loud Engine Noise at idle - YouTube Diesel Engines and Noise. Mar 13, 2010 · Discussion Starter · #1 · Mar 13, 2010. Any help would be greatly appreciated. the car again, it makes the popping noise at idle. My old '81 D150 with a stock 318 sounded awesome and wasn't really all that loud with dual 2 1/4" exhaust and a pair of Super Dynomax mufflers, more like a nice deep roar. Drives good on the highway and around town, but when at a stop the car shakes slightly when the popping happens. 5 hour) road trip tomorrow. In any case the popping does not incicate an overly lean condition in the running range. If I hit the gas in neutral it pops. Purrs like a kitten now. Re: Popping noise in exhaust in idle « Reply #9 on: October 16, 2017, 04:02:18 pm » I would leave the factory airbox in place until you've got to the bottom of the rough idle first, and get rid of that after market dump valve and put the OEM one back on. Occasionally if I sit with my car idling the engine (?) will start making a random popping noise, kind of like the timing of popcorn popping - it's not consistent. S#05411604. Exhaust popping will not happen on a cold machine or if the engine is running on idle. If the exhaust muffler an/or pipe isn't partially restricted, and the engine appears to run well at higher RPM, you may consider a lean. Chief915 said: I was out towing with the subruban last night, everything went great. I let my girl do a couple drive bys, and it. It's been to the dealers twice now and they are not putting a hand on it. Popping thru the exhaust on deceleration, normally means that the timing chain has some slop in it. On the menu Up there ^^, over to the left, User CP, click on it. Second video is from this morning cold start and let me know if you guys can here the bubbling/ popping sound from the exhaust. Singles have a tendency to pop and putter on deceleration. com/heat-hammer-hoodie. 2007 Mustang GT Convertible Stage 0 E-Force #402 Supercharger. As long as it doesn't pop at idle or under acceleration I think your fine though. You should be able to disconnect the collector all together and the engine should run without popping. The sound and movement are totally regular and follow a set time around half a second apart. Make sure you replaced your exhaust gaskets when you put on your new pipes and recheck the exhaust header connections (retighten) after about 100 miles. As with most supercars of the 2000s, it made a wonderful noise. Removing the P. He's probably talking about the popping sound coming out of the exhaust pipe. I dont understand how adjusting the idle made this happen- it always had a little pop before but now it is quite bad. when the car (90 tt) is @ idle i will notice a quiet pop from my exhuast (greddy evo) and it is only at idle. I have a 2006 mustang gt automatic that i bought used last month, since then i have installed a c&l intake and a brenspeed 91 tune. My old '81 D150 with a stock 318 sounded awesome and wasn't really all that loud with dual 2 1/4" exhaust and a pair of Super Dynomax mufflers, more like a nice deep roar. The carburetor regulates the flow of fuel and air to an engine. Understanding the Choke During engine crank on a cold start, a number of issues arise due to the temperature of the air and the engine itself, along with the slow speed of the pistons. I checked the valve clearances and they were very tight. Sounds like unburnt fuel coming out. Torch Red GT forum member. My initial ride on the bike was fine, but I was getting just a bit of a pop out of the exhaust when I roll off the throttle. It sounds like it has one of those 3 cylinder Chevy Metro engines in it. But does this mean the only vehicles that contain motors which give off a popping noise are those without mufflers? No, quite simply because most of the noise a motor puts out into a stock exhaust is muffled and cancelled out by the time it reaches our ears. He said before opening hood it has a misfire causing the jump. Maybe even a tinge of exhaust smoke wafting around too. Car is a 3rd gen Monte Carlo with an hei dizzy using a pertronix flame thrower coil. Put the stick in 2 and take a 1/2 hr run up the local highway. If the exhaust muffler an/or pipe isn't partially restricted, and the engine appears to run well at higher RPM, you may consider a lean. #20 · Jan 24, 2012. With the engine running at idle, use the insulated plug wire pliers to remove one plug wire at a time at the spark plug location. I've noticed the exhaust make a soft "popping" noise at idle. It sounds like it's not getting enough air or something. It always happens at the same time the engine stumbles for a second. Location: Long Island,New York. Be on the lookout for smoke or fire, two things you should never see under the hood. Adjust the idle mixture screw in or out. Car makes popping noise from exhaust at idle. Keith, I’d give this a try and hopefully. I recorded a video of what I'm experiencing below and a list of. After running vacuum advance on manifold vac, there is occasional popping coming from the exhaust. Most Common Causes of a Damaged Car Radiator. 5A/12 - Exhaust temperature before catalyst, bank 1, signal line, short circuit to negative 5C/12 - Exhaust temperature after. I bought the boat/motor last July. -Changed Idle Air Control Valve. I've noticed the exhaust make a soft "popping" noise at idle. First, when you close the throttle, you are also closing the throttle plates. I ran it for a while, hauled it home, and then took it for another ride. I'm hoping you guys could help me out. Jun 03, 2008 · Hello every one im new here Today. Car is a 3rd gen Monte Carlo with an hei dizzy using a pertronix flame thrower coil. One of the most common exhaust problems is a rattling sound. So, the popping you are hearing is not back-firing. The popping is coming from unburnt fuel entering the exhaust system. Dec 13, 2009 #1. But when it happens on decel its usually caused by a lean condition. Standing at the engine it sounds good but it just pops out of the exhaust. So can anyone help me? Will the exhaust pop if it was an O2 sensor related problem? I don't think so. Several causes. #4 · Sep 3, 2011. Usually it is because of a rich fuel mixture above idle and while driving and a lean mixture at closed throttle allowing excess oxygen into the exhaust to burn those residual gases from being rich. you start to give it the gas it pops. It sounds like pre detination so dieled. I did a compresion check not long ago and everything came out normal. 2016 Subaru Forester H4-2. It seems to idle. 2 1/2 turns was too rich tho so I turned them down to 2 turns out each corner - Now the. Popping/Puffing Noise from Exhaust of K1500: Sign In Hey guys. I killed it. Covered the exhaust output with hand and can feel exhaust. i did recently open the mix screws to 3. I had installed a map from Hanso so I tried him and he made some tweaks here and there but with no affect. Apr 14, 1999. I tune them in similar fashion but leave a very slight pop to know it is close. Aug 04, 2011 · Aug 4, 2011. get the codes checked 2000 tacoma with 3in suspension lift, 3in body lift, 35in bfg all terrains, rancho rs9000x shocks, in cab controler for shocks, tjm front bumper, hella 500 driving lights, powertrax lock right in the rear, and arb safari snorkel. Exhaust leaks can cause decel pop, make sure the exhaust is sealed completely at the motor, and at any other connections. What started as popping on deceleration is now almost constant and getting worse by the day. With the engine running at idle, use the insulated plug wire pliers to remove one plug wire at a time at the spark plug location. Re: Popping noise in exhaust in idle « Reply #16 on: October 18, 2017, 02:32:54 am » Having said that, with the slight vibration underneath in the cat area I do hear slight sputtering engine!. SmokeStang08 · Registered. If that is true you will not hear the noise when it is cold. Recently out of nowhere, my car started to make make multiple popping noises from what sounds like the. This is a fairly common symptom. Average failure mileage is 5,700 miles. It’s a popping noise coming from the exhaust at idle, almost like a skip or misfire. A backfire is a popping noise caused by gasoline igniting outside of the combustion chamber of the Allowing the engine to idle from 30-60 seconds before turning the key to the OFF position will generally prevent this after fire as unburnt fuel is ignited further down the exhaust system, producing a loud pop or even flames from the. My initial ride on the bike was fine, but I was getting just a bit of a pop out of the exhaust when I roll off the throttle. When it's in park/idle, there's a popping sound coming from the muffler, like you'd hear on a dirtbike. Discussion Starter · #1 · Mar 17, 2007. I have a steady -15inHg at idle measured at the back of the plenum - is this in the normal range? I've found a couple of leaks: split pipe leading to climate controls)and am in the process of changing the. Its just the fact that you have boomtubes and you can hear the normal exhaust noise better since the exhaust is less restrictive. I had my valves adjusted still have the same noise. when the car (90 tt) is @ idle i will notice a quiet pop from my exhuast (greddy evo) and it is only at idle. I have 100 miles on the car, I have the "mild" cam setting loaded and the only changes I have made to my setup are the base timing and getting the IAC % down when engine is warmed up. My mufflers are empty. 2015 Roadster. First, when you close the throttle, you are also closing the throttle plates. Try a size up pilot and down and adjust the screw again with the different jets. Free car sound effects. I have a 2003 sv1000s with hardly any miles. Still have the popping noise from exhaust when at idle. Put the stick in 2 and take a 1/2 hr run up the local highway. #9 · Jan 5, 2009. Carb heat off, mixture rich, throttle to idle, mags on both. Timing off - fuel going out the exhaust. Then, when I start the car when it's cold, the idle is weird. I am hearing a distinct popping noise from the exhaust after a 45 minute flight after I am on the ground, during rollout and idling on the ramp. The 30 sport coupe has developed a popping sound when you start it. Ive had this strange popping noise at idle for a while now. I have fresh fuel, the carbs had carb kits put in 2 years ago, plugs were new last spring and I only used the boat 5 days on water, the fuel lines are in good shape. It sounds like it's coming from the catalytic convertor. 5 turns out to get rid of 'small deceleration pop when coming to a stop sign' issue on right hand side. Popping in exhaust = raw fuel AND OXYGEN passing through through the engine and lighting off in the exhaust = misfire. May 02, 2013 · This was after replacing all the exhaust gaskets and re-sealing the cat pipe, etc as I had read the same thing the iceman talks of. Shop/Dealer Price. Harley-Davidson: 1. The Cessna 140 (with a C85) I had in the USA took some time to sort out, and we tried all sorts of different exhaust gaskets to no avail. Second video is from this morning cold start and let me know if you guys can here the bubbling/ popping sound from the exhaust. If its consistent popping in the exhaust at idle that sounds like its just one cylinder and the vacuum gauge needle is swinging you could have an "exhaust" valve problem. Maybe I'm nutz, but try backing it down a couple of degrees and see if it makes a difference. Not sure if this is true, my car has been doing it for years. I rebuilt the engine retaining the factory bottom end that was well within factory tolerances along with rebuilding the original to the engine 799 casting heads. It probably won't cause to much of a problem for now, but could cause some damage down the road. Don't let the car run too long obviously but a few minutes should be fine. My Berg Special 42 DCNF's are becoming increasingly temperamental and causing idle and popping problems (through the exhaust). If the idle mixture was, in fact, on the lean side and causing the “”popping”” sound at low RPM, once the technician turns the star wheel towards rich, the manifold pressure should begin to come down. Fuel is being ignited before the exhaust valve is seated. The carburetor regulates the flow of fuel and air to an engine. Even the Corsa (which I have on my V) pops a little when the engine is cold, but it isn't bad. Jul 23, 2021 · Loud Engine noise at idle L-Series Tech. If you find out the answer, please let me know. #20 · Feb 19, 2014. Listen for any change in the clunking noise. 1 - 7 of 7 Posts. For older Magnetti-Marelli fuel injected bikes, adjusting the fuel table to remove fuel can help reduce popping. Turning on A/C (once warm) drops RPMs about 100 and seems to lessen popping sound. Be sure that your carburetor's pilot jet is the correct size and that the idle air mixture screw is correctly adjusted before looking for other causes of popping. In most cases, this sound is similar to rattling steel inside of a cage or clanking metal. If the popping sound is more rhythmic and occurs more frequently as you rev the engine, you may want to look for an exhaust leak. - posted in Engine: Gday guys, I need some help. Ok im stumped. Also, there is a popping noise in the engine bay and the exhaust when the car is in drive or reverse. Maybe I'm nutz, but try backing it down a couple of degrees and see if it makes a difference. Lower the vehicle from the stands. So, the question is; "Does it pop out the exhaust during deceleration with a closed throttle from high rpm to idle, while in 4th gear or above?" 2) Midrange performance A) A lean condition in the midrange is somewhat hard to diagnose. What started as popping on deceleration is now almost constant and getting worse by the day. In instances like this, the muffler or tailpipe probably needs to be replaced. If the idle mixture was, in fact, on the lean side and causing the “”popping”” sound at low RPM, once the technician turns the star wheel towards rich, the manifold pressure should begin to come down. The popping from the exhaust started happening shortly after this. Question: "What causes the popping sound in the exhaust of some high performance automobiles?" What you are describing as a "popping sound" is probably the opening of the turbocharger waste gate which is controlled by turbo's the blow off valve an. The backfiring continues even if the RPMs are held so it is not an acceleration or deceleration issue. (advance base timing). It's like above 2500 RPM.