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 sounds like. In naturally aspirated engines, removing the exhaust pipe after the 1-2 parts nearest to the engine (exhaust manifold, downpipe) which implement scavenging from the cylinders (by Kadenacy effect) will reduce back pressure, leading to increased power at the wheels and improved fuel economy. Brake and Wheel Noises; Exhaust System Noises; Noise of Suspension; Outside The Car. ticking noise from engine sounds like exhaust leak but its not. I have a 1999 9-5 SE and I was told by an independent mechanic that I have a crack on the Turbo exhaust manifold. Answer Wiki. Wierd knocking/Ticking noise when about 2 rpm in accelerating!!! wtf! I would say exhaust leak also on this but then Im far from an expert, has it ever been near. Otherwise the entire system is welded solid. But at WOt it shoots down to 10. I could smell exhaust under the hood though, which was a big clue. Increased Engine Noise. 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. Below are three common symptoms of a bad exhaust system: Noise That Gets Louder. Hey, I'm getting a deep groaning sound when I accelerate, the more the load the louder the groan. the clips dry out and corrode with the exhaust gas heat. 9 engine and a 1998 dodge Ram Passenger Van 3500 also 5. If you would like to learn more about your exhaust system, keep reading. The turbo leak noise is more noticeable from below, like your video, than above if hole is on underside of hose. Whenever i accelerate the noise, ticking/clicking gets louder. I was told by a mechanic that the noise is more than. Many exhaust leaks, especially if they come from the exhaust manifold, can cause a ticking noise. An exhaust leak, vvt-i blockage or vacuum leak could appear and disappear depending on heat. If the engine picks up speed, you've got a vacuum leak. Re: rattle/rasp sound on acceleration - exhaust? Ok if it's a rattle and rasp which increases with engine rpm equally then I would say you are looking at an exhaust leak. Rather than guessing, take the car to a shop and have it put on the lift, and the entire exhaust system checked for leaks! While it is in the air, they can look for other problems that may be causing the noise too. No noise in normal acceleration. Blue exhaust smoke. This problem was there when I bought it. And it gets louder and faster sounding the. It started this morning: When I accelerate, my car sounds like a muffled lawn mower. Best Answer: Had a similar experience: My Oldsmobile had a patch welded onto an exhaust pipe. I have a fairly decent exhaust leak on the Corolla - doesn't quite make the same sound as yours, just sounds like a louder exhaust. The easiest way to check is get your head under the hood and listen for it whilst blipping the throttle, and if it does it in this situation then it definately isn't the clutch. ok so im pretty sure my DV was replaced just about a month ago, maybe a little long, also the PCV, but now im not sure if the DV was replaced, because im getting a whistle sound when accelerating fast and in high rpms only. i have a 1991 civic si hatch with a magnaflow exhaust system. I'm assuming it's a muffler or exhaust thing. If for any reason the exhaust becomes clogged, damaged or disconnected, engine performance can deteriorate, exhaust fumes become deadly, and the possibility of noise pollution can increase. And it gets louder and faster sounding the. 7 2wd with 2000 miles and have noticed a simalar noise in my truck. Also, an exhaust leak can also cause a tapping or flapping sort of noise and a lean condition (engine hesitation) because of the pull of extra air. Was looking for vacuum leaks and found that a stud is completely gone. A lifter is a metallic click or tap, an exhaust leak is not metallic sounding at all. Intake/Exhaust popping noise IGOTACUMMINS is an online forum and community for all Cummins Turbo Diesel enthusiasts. Exhaust leaks located beyond the catalytic converter may sound more like a hissing noise. Whenever i accelerate the noise, ticking/clicking gets louder. got so loud u can be in there to long. Possible sources of air leaks are though a faulty gland seal, which is usually accompanied by a static water leak into the boat when standing idle. Thus far, the engine's performance seems to be fine. Any ideas or things to check out? Thanks. Overheating, severe coolant loss, maybe oil loss, white exhaust smoke, etc. The sound may be especially pronounced during a cold start or during acceleration. Really puzzled by what could be the possible problem. My question is this, what could be causing a fluttering noise when im accelerating? Is this normal? My thoughts are that i might have an exhaust leak but im not sure. That is because continuing to drive with an exhaust leak or bad catalytic converter can damage other things in your vehicle's operating system. Tire & Aerodynamic Interference Noise; Full Sound Library; Submit a Sound; Disclaimer & Credits; There is a month for this!. If the hissing happens when you accelerate, it could instead be a vacuum leak from one of the small hoses around the engine’s air intake. That patch came off all of a sudden with kind of a bang. perry (marion ky usa) Ticking noise from engine. Luckily, most exhaust problems can be diagnosed simply by listening out for unfamiliar noises, or else with a visual check under the car. I had to edit the video to increase the audio volume level. Loud engine noise after oil change at Costco Hello, I took my dad's car (1993 Camry) in for an oil change (regular) at Costco yesterday. Went to the gym, left and halfway home (5-10 minute drive) I got a rumbling sound. Heres the issue: the engine makes a 'whoooooshing' sound when accelerating slightly hard, normal acceleration is fine - it sounds like a burst of wind noise which is what i thought it was, but its definately not that as iv tested it many times now. I changed oil on the car now that the engine has about 500 miles on it and took it out for a drive today. from an exhaust leak to tires on concrete, rain-grooved freeways. It blows out gray or white smoke when I hit the gas not sure if I’m at a standstill. The sound stops once speed attained. Roaring noise when accelerating! Here you can chat with other mums about the best makes and models of family car to suit your needs, which are the most spacious models as well as the best insurance providers and driving schools. I'm assuming it's a muffler or exhaust thing. I have a drowning noise upon acceleration, and a really slight exhaust leak. It only happens for a split second so I doubt it's a direct turbo problem, rather it might be something pressure/vacuum related. So I did some research and found this is a common issue. I can hear something like a quick exhaust leak or "blurp" at first quick acceleration when parked but not the whistle. - Does not make the sound when parked and the engine is revved. I wouldnt think such a small exhaust leak would cause noise under accel. 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. There is nothing wrong with the performance of my truck and there are no leaking fluids. The first sign of an exhaust leak is often heard. Take it off - two bolts and a hose clamp - drive around and see if it still makes the flutter noise. It started this morning: When I accelerate, my car sounds like a muffled lawn mower. Its just annoying and I want it to be fixed. The sound is especially loud during a cold start or when you accelerate the vehicle. ive tried 89 and 91 still get the noise. Misfiring spark plugs and bad cylinders can rob the car of its power supply, as can antifreeze or oil entering the exhaust system. brief, faint dirt bike sound on acceleration Vue Tech brief, faint dirt bike sound on acceleration - SaturnFans. I have a 04 F150 5. If the noise is coupled by a loss in engine performance, it means that the condition will be closer to the engine as opposed to closer to the muffler. 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. I have tried removing all the heat shields but the noise persists. If it does, then it is more likely to be rocker arms, pushrods, lifters, camshaft, cam bearings, timing chain and gears. I would think that an experienced mechanic would know if he heard an exhaust leak. LOL, I have two LEAKING ones if you want them. Went to the gym, left and halfway home (5-10 minute drive) I got a rumbling sound. If something came loose or broke, chances are there are more areas ready to fail. 0t, my flex pipe actually broke and made a metal rattle noise. 6 coming from just after one of its flex pipes that sounds similar to that at idle and on slight acceleration but at highway speeds almost impossible to hear. Blue exhaust smoke. If Blue Smoke appears all the time your engine is running then the first thing to check is the PCV (Positive Crankcase Ventilation) Valve. 0 has notoriously noisy injectors I nearly had a heart attack when my Jeep started a horrible knocking noise, very noticeable at idle, when accelerating, when revving with no load, it was bad, and I. The manifold has already been replaced by nissan due to a crack but this is a different noise, sounds like im driving a. Reading this article will acquaint you with the leakage signs and ways in which you could deal with this car problem. new air intake boot. I also hear an unusual fluid noise when I accelerate from idle to just above 1000rpm, sounds like it's coming from the glove compartment side of the car, no leaks of anything when I open the hood. That makes those loud race car noises that young male hot rod drivers like. Perhaps you have damaged or worn out gaskets or seals. the Throwout Bearing can give a more of a slightly chirping sound without the clutch pressed in, then with slight tension on the clutch it goes away. Sounds kinda like an exhaust leak. Sorry if I’m wasting your time. Best Answer: The noise is likely coming from the engine given that it occurs when the vehicle is not in motion. Well when I am accelerating, and I hit about 30 or so and am revving around 2500-3000 RPM's I get this terrible noise! I can explain it a few different ways, it sounds like a gargle sound thats coming from metal. If that's the case, it needs to be checked immediately since it can be hazardous if it is a leak and that leak were to somehow get into the cabin. I guess that may not always be the case. 4) Weak Acceleration – An exhaust leak will affect your ability to accelerate your vehicle. Rattling noises or banging when starting the vehicle, same as above. What's the cause of this sound? When your vehicle sounds as if it turned up the volume on the exhaust by a factor of three to five, it's usually caused by a leak somewhere in the exhaust system. An exhaust leak typically gets louder when you press on the gas pedal. It sounds almost like an exhaust leak, or a belt pulley bearing, but only does it under acceleration. My VW currently has an exhaust leak and that's exactly what it sounds like. I'd say it usually happens at about 1500-1700 RPM occurs when you're asking for a little more speed and usually stops when at cruising speed. 035 thou and brand new upstream o2 sensor. Delaying a needed car exhaust repair can make it cost more. Don't just turn up the radio to drown out a loud muffler. Vacuum Leak Symptoms: Difficulty Starting Engine. Rod knock sound only when accelerating? I have a 2002 Jeep Liberty with 146,000 miles on it. The pulsation of the exhaust flow under heavy throttle makes pinking/clicking/ticking sounds as it excapes through the leak. As long as you've been paying attention, nobody knows how your engine sounds better than you do, so if it starts to sound odd or even just a little different, there could be a problem. Therefore, the dangerous fumes should be quietly and quickly transported to the back of your car. I researched it online, and saw reports of the same sound from others with 2500's with the 5. Usually, the smoke that gets emitted is black, white, grey and blue. Around same time, idle in gear started to get rough and some hesitation on acceleration. I dont seem to have any power problems or transmission slippage. Car is a 53 plate with 112k on the clock. That said, a vacuum leak causing inconsistency in the fuel/air mix could cause car engine cylinder to misfire. On my car the exhaust manifold gasket was the cause of the tractor like noise, it only made a noise when accelerating quite hard under load, if you revved it stationery there was no noise. My car makes a hissing noise when I accelerate? Sounds like exhaust, or a vaccuum leak Get under the hood and see if you have a vacuum leak some where you. I've had my 5. Clicking sounds like it could be tappets or injectors, but in this case it was definitely a bad gasket. Just a general question, does leaving it untreated affect mileage and/or peformance at all? I plan on getting it fixed in the coming week, but was just looking for some insight. There is no smoke coming out of the tailpipe and there are no codes from the Vag-Com. Hey i have a problem on my srt4 an i dont know if any one can help with this but the problem i have is when i hit the gas pedal to the floor it hesitates an when it goes over 3000 RPM the down pipe makes a hollow sound an the boost stays at 5 lbs an seems like im redlining the car at 4000 RPM an i did a oil change on my car an the old oil had alot of medal flakes in it an under the car is. The sound appears to be in the dash, near the defrost vents about center slightly to the passenger side. 0 has notoriously noisy injectors I nearly had a heart attack when my Jeep started a horrible knocking noise, very noticeable at idle, when accelerating, when revving with no load, it was bad, and I. The diesel sound is really the most accurate. It is very noticeable when the engine is cold and quiets down after it warms up. There was a leak on a 3. It literally sounds like a spray paint can being shaken real fast almost "machine gun-like" sound. They wouldn't say much more than that and it sounded like something I can fix at home. So anyhow, I get this high pitched whistling/screeching sound coming from under the hood. 6 Duramax/5 speed Allison automatic. It's hard to explain the sound it's like all of a sudden, this loud sound happens. Try pushing on panels while accelerating. Volume of Noise. Is this a boost leak?. The EGR valve is designed to cool exhaust gas by burning exhaust for a second time within the intake system. or simply too loud i can't tell the diff. when I accelerate and apply a large amount of accelerator (like passing a car), I get a tatatatatatatatatat. It runs pretty good, but I noticed a clicking/ticking sound coming from the passenger side area when driving. There's also quite a bit of whirring during acceleration, all coming from the motor with very little sound coming from the exhaust. My 2001 Polo Gti has started stuttering/hesitating when accelerating at low revs. As long as you've been paying attention, nobody knows how your engine sounds better than you do, so if it starts to sound odd or even just a little different, there could be a problem. This mostly fixed the problem but the sound came back. Engine spark knock sounds like a metallic knocking, pinging or rattling noise coming from your engine. i meant to post this awhile back, but anyways. Does this sound like a boost or exhaust leak? Heard this for the first time when I pulled I to a parking garage. Heres the issue: the engine makes a 'whoooooshing' sound when accelerating slightly hard, normal acceleration is fine - it sounds like a burst of wind noise which is what i thought it was, but its definately not that as iv tested it many times now. It's not high pitched at all, and it doesn't seem to affect the continued acceleration or anything. I like the truck! The ticking noise is driving me crazy though!. Check the manifold bolts for tightness. rattle, vibration, leak or what?? when gradually accelerating in 4th gear from 35-45 mpg. But once i put it into drive, it starts doing the annoying clicking. Now I am gettign waht sounds like an exhaust manifold leak, when going up hill or accelerating. Below are the top 5 causes of engine ticking noises when idling and accelerating. 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. If theres a leak, youll for sure hear it this way. I hear a 'leaky exhaust' kind of noise in the cabin of my toyota camry, no noise when outside d car. A leak at the exhaust manifold sounds kind of like a ticking sound that goes up and down with engine rpm's, and gets louder the more you press on the gas. Mine has an AEM CAI, minor exhaust mods (removed huge resonator and put 2. Months back, it hesitates when applying more acceleration, then, it starts stalling, then it gave up. I've heard that whistling sound before at the start of a turbo hose crack/leak, the hose is whistling as air is forced out a small crack, that will grow to a big leak. ticking noise from engine sounds like exhaust leak but its not. So I did some research and found this is a common issue. Volume of Noise. He then took the injector off and the noise was gone. After thorough investigation with sound probe equipment, the noise emanates from the exhaust manifolds themselves, particularly in the area around the point where the exhaust runners exit the exhaust port in. perry (marion ky usa) Ticking noise from engine. That patch came off all of a sudden with kind of a bang. It sometimes happens at a little higher speeds like 75/80. It blows out gray or white smoke when I hit the gas not sure if I’m at a standstill. Below are the top 5 symptoms of an exhaust leak that is coming from your car. Loud noise coming from turbo. Picked up a 2017 Denali just over a month ago, been hearing a "fluttering"/rattling type sound when accelerating. The engine is very quiet at idle and only makes the sound when accelerating. Exhaust smoke is a way of your car communicating with you to say what is wrong. When you are accelerating in a motor vehicle, the engine often makes a humming sound. I also hear an unusual fluid noise when I accelerate from idle to just above 1000rpm, sounds like it's coming from the glove compartment side of the car, no leaks of anything when I open the hood. Re: Engine noise after replacing spark plugs. Hey i have a problem on my srt4 an i dont know if any one can help with this but the problem i have is when i hit the gas pedal to the floor it hesitates an when it goes over 3000 RPM the down pipe makes a hollow sound an the boost stays at 5 lbs an seems like im redlining the car at 4000 RPM an i did a oil change on my car an the old oil had alot of medal flakes in it an under the car is. The symptoms of an exhaust leak may include a louder than normal exhaust sound, the sound of exhaust coming from unusual places on your car, a "ticking" noise when accelerating, and the smell of exhaust. 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. To be sure take a old glove or towel and with the motor running push the towel up against the exhaust/tailpipe if you have little resistance and the motor doesn't bog down and you hear what sounds like a pressure cooker going off under the hood then you for sure have a leak either warped manifold or the. Average repair cost is $650 at 123,700 miles. 4 with 112,000 miles on it and about a month ago i felt like i heard more of a hissing noise coming from it when i was coming out of my house and it was just at idleyesterday i had a guy look at it real quick and he said he thinks it's an exhaust leak, possibly something with the turbohaven't noticed much of a loss of power but it does seem louder when you pop the hood and. I took my 2007 4x4 Tundra for 75k scheduled service and dealer ship did the air pump replacement 9both) at no charge. Exhaust leak or another "specialty"? Login Register. If in park it takes alot of rev. On my 2000, I have a leak on the exhaust flange between the mid pipe and muffler, as the flange itself rusted. - The sound gets louder as the RPM increases. It goes away when I let off of the accelerator. The following noises may be among those : A loud whine or whistle during acceleration Exhaust howling (spooky hoot) during turbo boost. Imagine breathing out of your nose really fast, thats what it sounds like inside the cab. My 2015 sierra 6. This mostly fixed the problem but the sound came back. Mine first started leaking when the engine was started from cold but would stop after driving for a few minutes,. to make the pop sound But in drive on the road. It does not happen when sitting still and the engine is revved. He replaced the plug, but still had the noise. Loud sound when you accelerate in your car? 5 6 7. Try replacing your EGR valve first, then O2 sensors. A leak anywhere in the exhaust system makes a rather distinct rumbling noise and is more noticeable when accelerating because the engine is working harder, making the noise louder. 7 2wd with 2000 miles and have noticed a simalar noise in my truck. A faulty exhaust manifold gasket will produce an exhaust leak that will sound like a hissing or tapping sound coming from the engine. My Bike Backfires During De-Acceleration After I Installed Aftermarket Exhaust. The noise sounds like it is coming from behind the glove box. The sound is more evident when outside around the vehicle or when the hood is open. There is no smoke coming out of the tailpipe and there are no codes from the Vag-Com. A/C system has leaked off refrigerant from a leak at the filter/dryer attaching pipes. My 2011 V6 has what I thought was an exhaust manifold leak under acceleration on the right side. Best Answer: Had a similar experience: My Oldsmobile had a patch welded onto an exhaust pipe. Research New Cars. and let it be like that, last night on a underground parking zone the sound was very loud just afraid because some people say it was the catalytic converter, and others say it was torque converter noise. I would think if it had an exhaust leak i would be able to hear it under slight acceleration also. The sound is especially loud during a cold start or when you accelerate the vehicle. Take it to a trusted exhaust shop and have them check it from manifold to tailpipe. Its driving us crazy because we can hear it clearly inside the cab even with the windows up. The closer to the engine that the leak is the louder it may be. If the sputtering occurs when the motor is idling, this is the most likely cause of the sound. Quick video to show how a bad exhaust gasket can sound from behind the wheel. From what I have read, the issue has occurred in low mileage vehicles as well. Actually, the "noise" comes on as a form of intermittent "puttering" sound. The video noise sounds to me like an exhaust leak IF the truck were at idle. Increasing the throttle increases the vacuum and the speed at which the air passes through the leak. Whats also weird is when i go over a bump, the noise goes with it. When you start up the engine and hear an increasingly loud noise coming from around the engine, it could be from a leaky exhaust system. When it does happen, it seems to be around 20mph and between 1500 - 2000 rpm. I have a 2000 grand cherokee 6 cylinder with 120K While accelerating I am hearing a clicking noize from around the motor. You don’t want to let this problem go unrepaired for too long or else it could cause more damage to your car. I had a similar noise at "startoff" rpms in my 99 RX300 (120,000 miles). as the removal will cause more noise when boosting. If the noise then falls away with the engine, you likely have a blowing exhaust or the like. You don’t need that. Replaced intake manifold gaskets all 12 of them and airmass sensor and the intake manifold was cleaned and new gaskets. The noise increases and decreases with rpm's. All the items posted could be a cause and many more. I guess that may not always be the case. Any leak of the muffler or exhaust pipe results in the engine noise escaping out of the exhaust system before the "muffler" has had a chance to do its job at silencing the engine noise. Also it doesn't appear to hinder performance. In a dry climate like the desert, it's probably not noticeable, and on a rainy day you can't tell because there is water dripping everywhere anyway. 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. My 2015 sierra 6. Im going on about 6 months or so since completely re-doing my exhaust (LT's and mid-pipe). Keep in mind that there is a gasket that mediates between the engine block and the actual exhaust manifold piping. If pressure builds up in the Oil Pan, the PCV Valve allows this pressure to release. - Shelby115 Sep 13 '14 at 18:56. I also have a noise what I think is coming from the engine when accelerating at slower speeds. As I mentioned, the rattling noise occurs only when I use the accelerator and it doesn't matter how fast the Jeep is going. I ONLY hear the ticking during acceleration or when the motor is under load. Exhaust Manifold Gasket Replacement Procedures. 0 L V6 Petrol powered Prado complain of an exhaust noise when accelerating - much like the sound of of an exhaust leak. I was getting some small exhaust leaks where the stock header. I have a 1969 Chevy Impala. Learn more about Mercury Mountaineer at the Edmunds. Here we provide some of the signs and symptoms to look out for when diagnosing faults and problems with the exhaust. After 3 days of investigation from a mechanic he found the #4 spark plug broken and the end was burnt off. Exhaust noise when accelerating I've just purchased a used 2001 Silerado 2500 HD with the 6. The 2003 Chevrolet Silverado has 2 problems reported for engine noise while accelerating. Identifying Automotive Fluid Leaks Build and Price a New Car. Anyway, that's your best bet. I can recreate the noise at idle by quickly tapping the gas pedal. The noise gets louder and more defined the higher I shift gears. I’ve never heard a sound like this before from an engine. That can sound exactly the way you describe. Re: HDI rattling heard when accelerating Post by DickieG » Sat Jan 21, 2012 1:10 pm I can't help thinking that the injector noise you describe is perfectly normal, direct injection diesel engines do produce a rattle when power is applied due to additional fuel being injected and are noisier when cold due to lower thermal efficiency in the. My problem: A "hissing" sound when accelerating. That can sound exactly the way you describe. Idles fine in park but rough in gear. > >I also had the entire exhaust system checked, hoping there was a broken hanger, or leak. It only did it under slight acceleration, not under full throttle or while coasting. Check the manifold bolts for tightness. Some of these cookies are essential to the operation of the site, while others help to improve your experience by providing insights into how the site is being used. I cleaned the throttle body the other day but still have the noise. It happens only when accelerating slightly hard. 0L SOHC) makes a clicking/ticking sound while I am accelerating. exhaust leak only when accelerating? when i rev the engine, it makes normal revvs and and sounds fine. as the removal will cause more noise when boosting. Rod knock sound only when accelerating? I have a 2002 Jeep Liberty with 146,000 miles on it. But my hunch is your problem will be found on air intake side of system particularly the intake manifold gaskets feeding cylinders number 5 and 6 in the back of engine. I ONLY hear the ticking during acceleration or when the motor is under load. It only makes the sound when the rpm climbs up. Your car’s exhaust system is sealed up tight — any leak will cause the engine to sound louder. The main reason for the whining might be a loose belt, that runs over the power steering pump's pulley. 4 99,000 mi that has an exhaust leak sound, but no exhaust leak. The EGR valve is designed to cool exhaust gas by burning exhaust for a second time within the intake system. Slowly and carefully place your hands over the carburetor throat. 0L SOHC) makes a clicking/ticking sound while I am accelerating. I can't hear it with the windows up, but with the windows down on a quiet street or while driving by a wall I can hear the buzzing. The exhaust gases are an old school way to detect symptoms of problems i. That happened to me, but I only had the ticking when under a load. And, Usually occurs after the engine has reached or is near normal operating temperature. You've got to narrow the noise description down, make a decision on what your actually hearing. The closer the leak is to the catalytic converter, the beginning of the exhaust system, the louder and more high pitched the sound tends to be. Hello, I am the original owner of a 2000 XE crewcab, with 147k miles. What Your Car Trying To Tell You By White Smoke From Exhaust White smoke from exhaust that looks like thin wisp is the topic for today. Broadcast Message 1419. They simply haven't looked hard enough to find it. If need be have someone that can raise the RPM. Look for black oil spray pattern from hoses for source of hole. I replaced the header gaskets and that didn't help. No we had the exhaust system off last weekend, its definately under the bonnet, if would have sworn it was the turbo hose lol i have had a few split hoses on various cars and its that noise. I'll go again to have the turbo off and see what has happened. if its a minor exhaust leak, chances are youll only hear it when the engine is under load. Exhaust: sounds like exhaust leak when accelerating from approx 4omph, dealer said it was smog pump. the choke stuck closed C. Exhaust manifold leaks you will hear on the very first start in the morning and it sounds more like a loud clapping noise compared to a tick tick tick noise, and goes away as the manifold heats up. A coolant leak, even small, can lead to the serious risk of damage to your dear vehicles. My 2006 Audi A6 has a sound like it has a exhaust leak when accelerating. Stock or Performance Exhaust System? [Dick Riess] The advertising would have you believe that larger cat back exhaust systems are a real help on MPG and performance. Rod knock sound only when accelerating? I have a 2002 Jeep Liberty with 146,000 miles on it. When cold or even after a short off time (park, run into store etc. 86 245DL weird metallic scraping noise on acceleration found another place to leak from, car makes no noise when driving in a straight line. Its REALLY noticable when you drive through a built up area and cars are either side as the noise bounces of eveything and makes the car sound like a bag of nails Any ideas cheers guys and girls. Infiniti QX56 Vehicles With This Problem. My car use to accelerate quietly until today when all of a sudden it makes loud noise when I accelerate or hit the gas as if I have a large exhaust (but I don't) My car: 1997 Honda Civic coupe DX 189k but OD broke last year. It is loud enough that it is as loud as my aftermarket exhaust from the cabin area. Help pleaaaassseeeeeee!!!!!. Exhaust gas opacity to be measure during free acceleration (no load from idle up to cut-off speed) with gear lever in neutral and clutch engaged or reading of OBD. No engine light is on, what could it be and is it expensive to fix? I thought. 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. Accelerating harder seems to make it lesson. You would not necessarily hear it at idle or free revving the engine. My car makes a hissing noise when I accelerate? Sounds like exhaust, or a vaccuum leak Get under the hood and see if you have a vacuum leak some where you. Foxacuraofelpaso. in some cases you must remove many other parts even to see the manifolds. I'm still wondering if there might be any other components that could cause a noise during acceleration. It has to be removed to check for any cracks. Our '15i that was lemoned because of transmission issues sounded like that after a torque converter replacement, but they just forgot to tighten one of the bolts on the exhaust. 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. I'm hearing a very loud horn sound when I accelerate. If you're questioning what is normal engine noise, I may have the answer. The past weekend I took my 96 LX for a spin.