Well, this doesn't sound like an EGR failure. The sound appears to be in the dash, near the defrost vents about center slightly to the passenger side. A fault in the timing belt of your car may also be the reason why it is not accelerating properly. One of the most common dilemmas that occur in the auto repair industry is the exhaust leak. It is quite loud when accelerating. And it’s only around that range of speed when I start to hear a very loud and annoying whistle sound coming from what seems to. to have poor fitment for a slip-on. This noise is more noticeable on acceleration because the engine is working harder, making the noise louder. The catalyst converter reduces the pollution produced by the exhaust fumes. I can hear it by a "ticking sound" and it is definately the exhaust. While your looking around, take a peak at the exhaust and band clamps. It makes the sound constantly regardless of hot or cold. Impeded exhaust flow from a bad catalytic converter can cause jerking hesitation, but an overall power loss is more likely. If your engine is loud, louder than a motorcycle, and the sound seems to come from behind the engine, you likely have a leak in your exhaust system. Don't do it for to long because it gets rather toasting quite quickly. Refer to a mechanic. It's much more noticeable when in lower gear and accelerating hard. On my '94, I recently (4 months ago) got my a/c checked out and had alot of leaks and the compressor was bad. My guess is that the rattling is coming from the exhaust system since the noise only occurs the moment I use the accelerator. Hi all, i have a ticking noise coming from the engine area when i accelrateits a really strange one. Video detailing what I found during an exhaust leak noise on a Nissan Altima. If you have a faulty exhaust manifold gasket, it will cause an exhaust leak that sounds like a hissing or tapping sound. exhaust leak only when accelerating? when i rev the engine, it makes normal revvs and and sounds fine. So a few hours later we went outside and started it up and sure enough, there is a pretty good exhaust leak on the driver side manifold area. It wont make the noise at idle, or if im stopped and revving it. Left untreated, the problem gets worse. I have a ticking noise coming from my 350 that is driving me crazy. Exhaust Leak Dangers. Do a boost-leak-test looking for any leaks in the system. perry (marion ky usa) Ticking noise from engine. Zen I have a Honda civic 2005 that makes a single clunking noise. While changing the antifreeze and both radiator hoses yesterday , I looked over everything that I could think of in the intake area and didn't see anything loose or. I was told by a mechanic that the noise is more than likely coming from the headers themselves. The valve is pushed out so the other end is flush with the valve seal. So it is related to torque or RPM. A leak at the downpipe, catalytic converters, or flexpipe is also another place around the wheels where the exhaust can leak from. Exhaust Noise and the Law of California, USA. The truck isn't sluggish when i get on it on the highway anymore, but this sound is new and wasn't caused by me. First, could a leak in that location cause the following issues: ragged idle, loud engine noise (particularly during acceleration when cold), strong exhaust odor outside the vehicle, vibrations or shakiness felt in steering wheel at higher speeds, and sluggish acceleration. The only scenario that I can envision where an exhaust leak causes such a degradation in engine performance as to manifest itself as poor acceleration is that the exhaust leak is both the symptom and the result of a significant blockage in the exh. Take it to a trusted exhaust shop and have them check it from manifold to tailpipe. There is no smoke coming out of the tailpipe and there are no codes from the Vag-Com. You may be able to save a number of dollars by performing an exhaust leak repair yourself. anyone else have this issueim getting a black spot under my carlooks like its from moisture dripping out of an exhaust leaki can see the clamp thats leakingits right before the Y pipeis this something i should just handle myself (tighten the clamp) or will that not most likely fix it?. https://flic. The common noise is a puffing noise and you can smell the exhaust fumes. I found that the #2 coil was busted. Hi guys, Yesterday i noticed a very strange noise coming from under the bonnet whilst driving. A rumbling sound when a Civic Hybrid is accelerating could be due to an exhaust leak. I recommend having some one inspect the exhaust system for any leaks, if everything looks ok you'll need to do a little more investigating, but the exhaust is a good place to start and it is very common for them to leak in older cars. The ticking sounds like an exhaust leak. On top of that the truck has a ticking almost exaust leak sound when its not hissing but I have seen alot of posts of people saying that is just how the engines sound cause of the exaust manifolds. Left the car in the parking lot at work today, in the rain. It´s comes from the passenger side, when you sit on the passenger seat, it sounds like it comes out of the glove box area. First one of the #2 exhaust valves that was the cause of the issue at rest. The noise gets louder and more defined the higher I shift gears. When my CAT core collapsed and chunks of it lodged in the pipes it was making an "air rushing" noise whenever exhaust flow was high. I hear a 'leaky exhaust' kind of noise in the cabin of my toyota camry, no noise when outside d car. Leak from coolant or air/vacuum hoses. An exhaust leak would be noticeable at idle too. I just came here to say this. Although this is cheap and fairly simple, it can lead to premature degradation of the manifold. Average failure mileage is 11,700 miles. - Shelby115 Sep 13 '14 at 18:56. 5" in its place and also removed the skinny ass kink that is after the cat. An engine is not supposed to backfire and, when it is persistent, It could be harmful to the engine. a leak)? Does it sound more like spark knock? I already have leaking valve guides so could this be related to something more serious in that area? Thanks. Does this sound normal? So this is the first time I've rode without anything in my ears (plugs or earphones) for a while and I noticed two sounds at higher speeds (>30mph) and only upon acceleration. of the car's exhaust system has sprung a leak, or possibly has. A fault in the timing belt of your car may also be the reason why it is not accelerating properly. I just bought a fairly used Toyota Corolla 2010 model and when I took it for a test drive, I heard noise when I accelerate which then smoothens out as I drive on till I brake again and try to accelerate, this noise seems to be coming from under the hood on the passenger side, I bought the car regardless - thinking it could be exhaust issues. The first sign of an exhaust leak is often heard. It sounds very much like an exhaust leak. I changed over completely to R134 and have noticed that when I accelerate and I have it on MaxA/C, my air goes to the defrost vents and there is a flapping sound under the dash. When driving on highways, if I passed beyond say 100kmph, let off the accelerator and then pressed again to increase speed, it would create a sort of Grinding/Growling noise. hopefully the experts here on Guam. Car - 95 Talon Tsi When the car is at idle, I can hear a loud leak from around the exhaust manifold area. I still have this sound. 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. exhaust leak only when accelerating? when i rev the engine, it makes normal revvs and and sounds fine. I can recreate the noise at idle by quickly tapping the gas pedal. When the engine is loaded, exhaust drive pressure between the head and the turbo inlet on the exhaust side increases significantly. Your car’s exhaust system is sealed up tight — any leak will cause the engine to sound louder. Some days bad, like today, and other days no noise at all. Thanks for your question! It sounds like you are on the right track! If you get a similar noise when accelerating and turning the steering wheel it sounds like your power steering fluid level is low. If it's coming from the exhaust ports at the heads, you'll need to remove the exhaust, install new seals, and starting at the heads, making sure you use hi-temp anti-seize compound on the studs, tighten things from the front head back, THEN tighten the clamps at the frame, then the muffler hanger. The sound isn't present unless there is something for my exhaust to bounce off of on the passenger side of the truck. However, do it only when the engine is off for several hours. A sudden ticking or tapping noise that is loudest when the engine is first started and lessens as the vehicles warms up may be an exhaust leak. Lastly, I should also mention that the sound seemed to get louder after adding the catback, which seems counter intuitive because one would think the louder exhaust would drown out some of the exhaust leak noise (if that's what it is) - I do not think the catback could have caused/increased the noise/leak because it doesn't go up that far - the. Reading this article will acquaint you with the leakage signs and ways in which you could deal with this car problem. If you have a faulty exhaust manifold gasket, it will cause an exhaust leak that sounds like a hissing or tapping sound. The noise is not always there. An exhaust leak and other car exhaust repairs are costly. The sounds seems to sounds as if it is high up on the dash board behind the radio. do you have a whistle sound coming from 3. If the noise still persists, then the problem lies somewhere in the drivetrain or transmission. Carbon monoxide is a colorless, odorless and tasteless gas that is toxic to humans. After some probing, I found an exhaust leak underneath the cabin. Clunking when accelerating or decelerating was created by K. For example, when taking off from a stop if I drive it hard, the noise is louder, if I let off the pedal to just cruise, you can't really here it anymore. If you notice a change in exhaust tone if you drive through a puddle, that might put more weight toward an exhaust leak. Blue/gray exhaust smoke means there’s likely an oil leak and your engine is burning oil. It happens only when I accelerate hard, i. I just recently got my transmission fixed it was leaking pretty bad but now that it's fixed I have a really raspy noise coming from under the car when Raspy noise when accelerating - Mustang Evolution. Well, this doesn't sound like an EGR failure. Learning about them should help you diagnose the problem faster and put an end to it. My money is on a leaky exhaust cheap welds break over time. It happens only when accelerating slightly hard. Hi everyone, I have a K1 600 and the headers and exhaust keeps leaking, regardless of me changing the gaskets and reseating the exhaust, it will seal for a day and then start leaking again. Ten Sounds That Tell You When Your Car Is Broken Not only will exhaust leaks make your car sound worse and possibly put you and your passengers at higher risk for carbon monoxide poisoning. Clunking when accelerating or decelerating was created by K. Well, I'm in the process of ruling out engine knock, and I'm getting this "tick-tick-tick" that sounds like an exhaust leak at the header somewhere. The video noise sounds to me like an exhaust leak IF the truck were at idle. Exhaust manifolds crack and make loud noise on acceleration Problem Description It is not uncommon one or both of the exhaust manifolds to crack resulting in an exhaust leak. While changing the antifreeze and both radiator hoses yesterday , I looked over everything that I could think of in the intake area and didn't see anything loose or. 2020 Ford Reviews; 2020 Ford Police Interceptor Review By Larry Nutson; 2019 Ford Reviews; 2019 Ford Edge ST 12 Years On - Review By Larry Nutson; 2019 Ford Edge ST Review By Larr. Once you've determined a vacuum leak is present, here's the easy way to locate it. Leak from coolant or air/vacuum hoses. But don’t think it would stop making noise when I let off the pedal. It sounds even louder when the gas pedal is pressed. Louder Engine Noise. Take your foot off the throttle and the flow is suddenly cut off even though the engine is still turning and the valves are still opening and closing. One of the most common exhaust problems is a rattling sound. It goes away when I let off of the accelerator. Had run into a problem with my truck not accelerating anymore I was on the freeway going about 65 to 70 mph. I can feel vibrations under my feet while I'm driving. It's exhaust style noise, hurts ears after a while. The exhaust place kept it for a day and a half, welded a small unrelated leak near a catalytic converter for free, and said they couldn't figure it out either. If it's coming from the exhaust ports at the heads, you'll need to remove the exhaust, install new seals, and starting at the heads, making sure you use hi-temp anti-seize compound on the studs, tighten things from the front head back, THEN tighten the clamps at the frame, then the muffler hanger. This is why it doesn't usually get much attention beyond the maintenance carried out by the mechanic during periodic servicing. Freelander 1 TD4 strange sound when accelerating. Video detailing what I found during an exhaust leak noise on a Nissan Altima. The contact owns a 2005 Nissan Titan. Carbon monoxide is a colorless, odorless and tasteless gas that is toxic to humans. Sounds like it gets louder/happens more when im under boost. It sounds like an exhaust leak to me. the clips dry out and corrode with the exhaust gas heat. Help pleaaaassseeeeeee!!!!!. Does the car also idle louder than it should? If you can, get under the car and check the flange between the header and cat converter and the cat in general. Do you hear a roaring sound as the vehicle accelerates to higher speeds? Does it sound like an airplane taking off? If yes, there are three likely problems with the car. Anyway, that's your best bet. a ticking sound similar to tappet noise but less frequent can be a hole or bad seal somewhere around the headers. Reading this article will acquaint you with the leakage signs and ways in which you could deal with this car problem. Had a severe sputtering problem to when accelerating but after changing plugs, wires, fuel pump and filter, fixed 2 vaccuum leaks, the sputtering upon accelerating is the only thing it helped,still left with rotten egg smell and sputtering when drivin in overdrive. I am wondering if whatever is loose in there gets in the right place and restricts the exhaust flow and makes the turbo charged noise. Infiniti QX56 Vehicles With This Problem. Other culprits behind slow acceleration may include a slipping clutch, the transmission system itself, or an unexpected or unrelated problem which may surprise even veteran mechanics. I have a 2005 Pontiac g6 that started making really loud roaring noises yesterday when i accelerate or turn on the car. Engine Problems Your engine is complex, and numerous problems within could lead to a whining sound to come from your car. Pro-Tip: Blue smoke during acceleration means your vehicle’s piston rings may be. sounds like exhaust leak into cab on acceleration, also get. The noise becomes relevant after 30mpgs and becomes annoying at highway speeds. The car's engine speed will fluctuate up and down as the engine computer struggles to find the right mix of fuel and oxygen. This is the sign of an exhaust leak. Open the hood and inspect the A/C compressor for damage and to see if the compressor is seized. So she started it up and I could barley hear an exhaust leak. You could have a bad manifold gasket or maybe just a hole from rust, you never know. It does sound like an air leak. I absolutely love the car, but it occasionally makes this weird sound when i accelerate gently from low speeds. 5 Dlx) from May this year. One of my friends says the hissing sound may be the Fan Belt, and that seems like a possibility. My VW currently has an exhaust leak and that's exactly what it sounds like. Whining noise under acceleration I've been looking around for old threads on here that sound similar without too much luck, so I decided to post. it bugs the crap outa me. I want to help you but i need information. Lots of people tighten things out of order and. If you have a faulty exhaust manifold gasket, it will cause an exhaust leak that sounds like a hissing or tapping sound. it sounds like an exhaust leak (hissing, fast ticking) under my feet when accelerating, more noticeable if i floor the pedal at a low rpm in higher gears. 2003 C70 T5M Convertible - Eibachs, Koni FSDs, Enkei RSF5s, OBX downpipe, Snabb intake, RIP kit, & drop-in intercooler, Quaife LSD, 19T, Green Giants, 22 psi Hilton tune. Exhaust Leak. Symptoms will begin as a ticking type noise noted on acceleration when the engine is cold. Our TJ had the same sound, turned out to be an exhaust header crack that widened when the exhaust pressure increased due to acceleration. It almost always does it too?. It is a warranty repair. When you are accelerating or cruising along, your engine is creating a smooth flow of exhaust gases. It makes no noise when I rev the engine in park. They're supposed to have a nice roar/engine sound on accelerating. By the way, the Turbo Valve has a thumping sound but not loud enough to hear. Now when I first start accelerating from a stop, it makes a vrrrrrrrrrrrrrrrrr revving sound at about 5mph and then by 10 mph its gone and no further sounds but it does it every time I stop again and press the gas I hear it again. The only thing i'm wondering about is the ticking noise heard when i accelerate. Learn about this problem, why it occurs, and how to fix it. Look at the 3rd picture. You've got to narrow the noise description down, make a decision on what your actually hearing. I just bought a fairly used Toyota Corolla 2010 model and when I took it for a test drive, I heard noise when I accelerate which then smoothens out as I drive on till I brake again and try to accelerate, this noise seems to be coming from under the hood on the passenger side, I bought the car regardless - thinking it could be exhaust issues. Search ticking and you will find the post. The truck now has 1,000 miles on it and the noise seems to be getting less as the miles rack up. Im going on about 6 months or so since completely re-doing my exhaust (LT's and mid-pipe). If the oil exits to the exhaust, the oil will be burned by the heat of the engine exhaust gas in the catalytic converter. Help pleaaaassseeeeeee!!!!!. I checked the exhaust manifold bolts and they are tight and the joint seems not to be leaking. Sounds like air is shooting out when accelerating. I'm still betting it's an exhaust leak. The multi-layer steel shim type gaskets can, when a flange warps or becomes loose, vibrate between the clamped surfaces causing a screeching noise. Let off the gas and it stops. The sound may be especially pronounced during a cold start or. I pesonally thing that it could be the diaphram in the vacuum canister that accuates the heater/vent valves (for lack of a better term). Sounds kinda like an exhaust leak. 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. The engine runs smoothly, no rattling, no performance issue whatsoever. The catalyst converter reduces the pollution produced by the exhaust fumes. Only during accelerating did it make noise. I have always been able to hear exhaust pulses with my o/r pipe, but this sounds almost like an exhaust leak. here it is, it only makes this ticking noise when i accelerate, im thinking maybe exhaust leak or maybe a bad driveshaft coupler, i don't think it's the lifters since i can't hear anything when i put my ear next to the valve covers when the car idles or when i rev it. Infiniti QX56 Vehicles With This Problem. One of the most common dilemmas that occur in the auto repair industry is the exhaust leak. The other reason is a serious health risk to all passengers in the car, as the exhaust fumes that leak will seep inside too. The exhaust manifold is on the side (or sides) of your engine toward the bottom. Location: Springtown. 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. Note that exhaust sound decibels are not checked during exhaust inspections so long as the exhaust is not leaking or incomplete. Loud noise when accelerating? Sounds like an exhaust pipe, muffler or manifold leak. Hope I did good enough here. The noise a damaged outer CV joint makes is a clicking noise with a metallic tone: sometimes faint, sometimes very noticeable, but constant while turning or accelerating. Average failure mileage is 23,800 miles. So they put my car (and me) on an elevator around 2meter high and told me to accelerate. I have interior rattles but I also have an exhaust leak type sound when accelerating, not sure if it is an exhaust leak, the infamous dodge cracked manifold or just normal noise, the dealer will be looming at it when I take my truck there soon. Exhaust leaks become loader when accelerating, this is something crankshaft related. rattle, vibration, leak or what?? It's most noticeable when gradually accelerating in 4th gear from 35-45 mpg. Engine Noise in Car When Accelerating I've got a relatively well taken care of 2002 Lexus ES300. 9 L 95 F-150, I love it and like to keep it so I can love it When the engine is running with no load it runs like a top; however when any load is applied ie up a hill in 4th gear or any kind of acceleration it starts making a heavy and loud ticking or "chitch - chitch-chitch" sound. Car is very loud when accelerating especially when driving next to a wall on the highway. Aug 20, 2019 at 8:15 AM #1. Keep in mind that exhaust gas, especially carbon monoxide, can be deadly if it enters the interior of the car. Solution: Have your exhaust system checked by your mechanic or a muffler shop. it bugs the crap outa me. A bigger leak might be felt through the steering wheel and throughout the car. I am pretty certain it is an exhaust leak, although I haven't been able to take a look underneath. When my truck is accelerating directly after a gear change when a load is applied I get a really odd tin can retelling noise. It makes no noise when I rev the engine in park. I researched it online, and saw reports of the same sound from others with 2500's with the 5. Exhaust leaks also leave a trail of black soot. You should be able to pin point your leak in the exhaust system using this method. If you have a problem with your exhaust, it will begin to affect the performance of your engine. anyone else have this issueim getting a black spot under my carlooks like its from moisture dripping out of an exhaust leaki can see the clamp thats leakingits right before the Y pipeis this something i should just handle myself (tighten the clamp) or will that not most likely fix it?. I had a mechanic look at it but he couldn’t tell what the sound was coming from. Engine is the 3. It could have rusted out and would be throwing a CEL and producing more noise. The fix, if this is correct, is to replace the exhaust manifold gasket or possibly the exhaust "doughnut" where the exhaust manifold connects to the exhaust pipe. It happens only when I accelerate hard, i. It stared about 2 weeks ago. After 3 days of investigation from a mechanic he found the #4 spark plug broken and the end was burnt off. the ticking noise when cold is an exhaust leak. While I'm driving there's a loud lawn mower sound coming from my engine. 3 in 4 times for the same problem, exhaust leak sound on the drivers side, they eventually found an exhaust leak and replaced exhaust donuts. Sound like the exhaust is hitting an empty metal container. This is a discussion on noise when accelerating within the Automatic Transmission forums, part of the Drivetrain category; I am hearing a metalic rattle noise when accelerating on the highway - R rear. Exhaust leaks located beyond the catalytic converter may sound more like a hissing noise. Second, there could be issues with the transmission. Ignition and Exhaust. See video; sounds like exhaust or vacuum leak? Hi, It sounds the same as my engine did when the manifold gasket failed. i have a problem. I was getting some small exhaust leaks where the stock header. 1000 to 2000 RPM. It is loudest at initial acceleration and just after it goes into second gear. Many exhaust leaks, especially if they come from the exhaust manifold, can cause a ticking noise. ticking noise when accelerating Hey guys, when I accelerate in 1st, 2nd and 3rd, there is a noticeable ticking noise coming from the engine bay. The Durango crowd keeps being told it's exhaust leaks,(brand new vehicles BTW) air conditioner drip tube letting in engine smells etc. My 2001 Kia is making a roaring noise when I'm accelerating then I can hear it while I'm idling, the three motor mounts were replaced, my two new tires were rotated from the back to the front and just started to make the roar noise plus new front struts, it's never done this before. Vacuum Leak Symptoms: Acceleration Problems and Misfiring. Is this normal? I also have a hesitation whenever I try to keep a constant speed between 40-60 mph. Skip navigation Sign in. If I accelerate very carefully, there is no noise. a leak)? Does it sound more like spark knock? I already have leaking valve guides so could this be related to something more serious in that area? Thanks. It happens only occasionally, specifically when I start to brake, accelerate or sometimes when I let go of the gas. The engine has 180k miles. On modern vehicles, oxygen sensor failures don't typically cause hesitation; the computer should realize the sensor is bad, and will likely ignore its data and detune the entire engine until you get it fixed. My car idles really loud. Learn more about Mercury Mountaineer at the Edmunds. As the metal expands, exhaust manifold cracks and flanges expand, allowing more exhaust gases to escape. These loosen up over time on these inline motors due to their reverse-flow design. I am pretty certain it is an exhaust leak, although I haven't been able to take a look underneath. I usually turn my exhaust brake off when it is cold and I'm warming the truck up. I have had a broken stud which has allowed the gasket to leak. So you said it smells like exhaust, the sound at idle sounds like a 'pft, pft' sound and the sound while driving sounds like a ticking sound. 5" in its place and also removed the skinny ass kink that is after the cat. When i accelerate i can hear a faint ticking type noise coming from engine area. This oil leak can enter the exhaust or into the intake. Loud noise when accelerating? Sounds like an exhaust pipe, muffler or manifold leak. There can be a leakage in either the exhaust system or the power steering system. to have poor fitment for a slip-on. I recently bought a 2006 300c Srt8. If it does I would say it is normal, mine has been doing that for several hundred thousand miles. It's much more intense when coming off of hard acceleration. Sooner or later one of the bearings will fail, and when it does one of two things will happen. Depending on whether you are accelerating, downshifting, or just idling, your engine will vibrate and move quite a bit. Video detailing what I found during an exhaust leak noise on a Nissan Altima. 2020 Ford Reviews; 2020 Ford Police Interceptor Review By Larry Nutson; 2019 Ford Reviews; 2019 Ford Edge ST 12 Years On - Review By Larry Nutson; 2019 Ford Edge ST Review By Larr. Well recently it’s developed this obnoxious hum and vibration at 65 mph. Exhaust Noise Only When Accelerating After Catalytic Converter Replacement. Does the car also idle louder than it should? If you can, get under the car and check the flange between the header and cat converter and the cat in general. One of the most common dilemmas that occur in the auto repair industry is the exhaust leak. Worn or defective brake components. Try since the last one killed it while trying to drive the manual transmission. Second, there could be issues with the transmission. It happens under moderate acceleration (if I take it slow from a dead stop, 50/50 chance of happening and is much less severe sounding) and lasts maybe 2-3 seconds. I was driving with my dad and he said it sounded like an exhaust leak but he's not really a car guy and I can't smell any fumes either while driving or when I get out of the car. CHP Bulletin NO. The sound seems to be coming from somewhere very close to the engine, but since it doesn't happen when parked I can't pop the hood and look around for where exactly the sound might be coming from. After 3 days of investigation from a mechanic he found the #4 spark plug broken and the end was burnt off. I disagree 1000000% on the tires though, DO NOT go by the. Upon > testing, good primary boost (10 or 11), but once over 4500, boost drops to 2 > or 3 and there is a massive hissing sound. Sounds like air is shooting out when accelerating. I first thought it was exhaust coming out of the compression release, but they look normal. Months back, it hesitates when applying more acceleration, then, it starts stalling, then it gave up. It happens any time whether I am in neutral or actually in gear. The video noise sounds to me like an exhaust leak IF the truck were at idle. Whining noise under acceleration I've been looking around for old threads on here that sound similar without too much luck, so I decided to post. Sounds like it gets louder/happens more when im under boost. Exhaust Manifold Gasket Replacement- Causes, Symptoms, Severity and Estimated Repair Costs. The noise I have is on the driverside by the door/ footwell area and sounds like an exhaust leak. An automobile relies on constant vacuum pressure to operate correctly, according to 2CarPros. It will only happen if im accelerating. After a long time searching for the location of the supposed exhaust leak (and finding none), I revved the engine up to ~2000 RPM, and it seemed to be misfiring during the acceleration, but ran smoothly if the acceleration was slow, and ran smoothly when idling. Eventually, this can lead to cracking, loss of oil control and valve stem seal failure. I have this strange squeal sound when under acceleration, regardless of the gear the car is in. Think I have some leaks at the band clamps as well. Below are the top 5 causes of engine ticking noises when idling and accelerating. The exhaust manifold gasket leaking noise is the result of the contraction of the cast iron metal of the exhaust manifold and the cast aluminum head on the engine, leaving a tiny gap at the gasket, which allows for the exhaust gases to leak through. If your exhaust sound is at the back of the vehicle, have a shop check for leaks right at the muffler. Idles fine in park but rough in gear. I’ve used something as simple as a length of garden hose for a beer budget stethoscope, probe with one end and listen to the other, to isolate to where your puff sound is coming from. An exhaust leak would be noticeable at idle too. Has the noise stayed the same over time? A rod knock will only get worse over time. hi nice to meet you. I noticed that the noise is worse when the engine is hot, and much less when the engine is still cold from a startup. My best guess is that I have an exhaust leak somewhere near the exhaust manifold, but it is hard to tell. The most common noises cars make during acceleration is either a sucking wooshing sort of sound or a loud exhaust noise. Loud Engine Noise Problems of Chevrolet Trailblazer Chevrolet Trailblazer owners have reported 10 problems related to loud engine noise (under the engine and engine cooling category). When coasting no - Ford 2002 Mustang question. It is a constant noise as it doesn't get louder on rpm but does speed up with the increased rpm, motor has been serviced every 5000kms and has only done 160000kms I haven't replaced the injector pipes as of yet as recommend at 150000kms. As RPM increases, so will the occurence of the audible noise. a leak)? Does it sound more like spark knock? I already have leaking valve guides so could this be related to something more serious in that area? Thanks. Depending on whether you are accelerating, downshifting, or just idling, your engine will vibrate and move quite a bit. Exhaust brake screeching sound. When the car is accelerating, and i hit 2500-3000 rpm, i hear a sound that's kinda like a scraping or a hiss. Once I let off the gas, it goes away. The turbo whistle usually goes unnoticed but can become very obvious when the exhaust is leaking. That makes those loud race car noises that young male hot rod drivers like. My 2015 sierra 6. After that I have had a hissing sound that is directly tied to the acceleration of the car. Vehicle coasts smooth and quiet. Almost sounds like a lawn mower does when its running on "choke" mode. Does anyone else who has a 4cyl, 4wd think their truck has a exhaust leak? Under acceleration it often sounds like it has one. Signs of an Exhaust Leak If you are looking for some guidelines on dealing with exhaust leak problems, you have landed on the right page.