Knocking Sound Under Car When Accelerating

Would start after the car warmed up, stay on for ~10-20 seconds, then disappear. Page 1 of 2 - Light clattering clicking sound when accelerating - posted in Maintenance & Repairs: Hi all, anyone experience light clicking or clattering sound in their auto car when during light acceleration? The sound is very much like a manual car accelerating and upshift of gear when the speed for that gear have not been attained. The noise is intermittent but getting worse. Sound as if something is loose, I have inspected the muffler, other areas. It seems to be coming from somewhere in the rear of the engine but I can't pinpoint where or what it is. The knocking noise is at low speed in rpm (1500-2000rpm), if accelerated over the noise stops. Cars on coilovers. I've searched in a lot of forums trying to find an answer for my scenario. I have a knocking / rattle type noise when I accelerate. Several weeks after purchase, she was hit by a truck. When I idle the car is nice and quite no sounds. to be honest, it does it in all gears, just depends if you can hear it due to wind/road noise. goes away if its in park or as soon as the revs pick up when i take off again. 2016 Jeep Patriot Knocking when Accelerating. In all honesty, it can be tricky to diagnose such a problem unless you bring the car to a certified mechanic. Under load (accelerating uphill is the greatest load) then you could simply be suffering engine knock. This week I have an issue come up. I have a ticking noise coming from my 350 that is driving me crazy. Rattling sound only when accelerating Hello -- I recently started experiencing a problem with my 2002 Toyota 4Runner (168k miles) where it is making a metallic rattling sound on acceleration. when I start in the mornings and press the gas, I hardly hear this sound. I've noticed a "fluttering" sound (kinda like a playing card in a bike wheel?) when I am accelerating, especially at low, start out speeds (like from a red light). It sounds more it is coming from inside the engine bay (only I can't tell from where, left or right is impossible to determine by sound). I'm not sure under what topic to post this because I don't know where its coming from. If the sound is as if someone put a cherry. I put the car up on the lift and I did not see anything. The harder I accelerate the harder the thump. Weird knocking sound coming from underneath car(not the motor) 1998 RS Hey all, So recently I have been having this weird sound coming from under my car, and I can feel it also. This would sound almost like a starter clicking from a dead battery. Year and engine size/type would help in the future. It goes away after I get up to around 5mph. Ran for 100 motorway miles or so when a strange knocking noise ocurred under acceleration ( in any gear ). i'm enjoying my 2nd honeymoon with my car again! it's runing great! I cant help to wonder what causes a cracked manifold. It doesn't make the noise at any other time or condition, not when I'm going much faster or on the highway, not when I'm accelerating (fast or slow), not when I'm de-accelerating, not when I'm braking. I'm getting a loud humming/vibrating/knocking noise - like someone knocking on a door, only less loud - when accelerating and when I stop accelerating, the noise stops, but the actual vibration with a slight knocking noise doesn't seem to end until the car comes to a complete stop. If the noise still persists, then the problem lies somewhere in the drivetrain or transmission. Refer to a mechanic as soon as possible. It started off only knocking when accelerating now( sounds like it's coming under neath centre console area ) now when I lift my foot off accelerator it sounds really really bad like something gonna fall out. check your oil and if it's full then you may need to think about either. This one however sounds like a dieselloud clattering noise that is unusually loud at times and can be heard inside the car. Honda knocking while accelerating i took the car for a drive and while driving first thing i noticed was a very obvious knocking sound coming from the engine when. However, I have not noticed a change in performance in any way. I've noticed it happening in 1st, 2nd and 3rd (only once) gear. it only happens under deceleration or coasting (no load on the drive line). I've got 1500 miles on my 2004XC and have brought my car to the dealer two times attempting to cure an intermittent rattling noise encountered only during acceleration. Spark knocking occurs when the gasoline detonates too early and makes a rattling, pinging, or knocking sound. It sounds mechanical and coming from the front of the car. sounds like its coming from under the drivers seat or just in front of it (almost as if its the dash). It sounds more it is coming from inside the engine bay (only I can't tell from where, left or right is impossible to determine by sound). 8L with about 91k miles and I decided to test the performance of the engine, which I did. SCREECH UNDER ACCELERATION. The 2002 Ford Explorer has 20 problems reported for engine knocking sound. It idles fine during initial start-up as all cars do, but once it is warmed up it idles up and down probably lopes about 200RPM in both directions. 1st Gen Durango - Clicking noise while accelerating - I have a 2001 durango 4. if I put it in park and rev the engine there is no noise, you also don't hear it at idle. I'm thinking the noise. My car feels juddery and there is a knocking noise coming from rear when I accelerate(and feels a bit lumpy) Could this be the diff? When coasting the diff does not make any strange noises only when accelerating at the low rev range. Bad vibration,clunking,knocking sound from front drivers side MeganeSport. Have had the wishbones, engine mounts, ball joints, all changed but still there!! Any help or ideas would be gretful 2006 300c basied in the UK:12:. When I driving my car sometimes when I'm going to accelerate after slowing down (breaking), although the accelerator pressed it will not accelerate and also the RPM remain same and the accelerator pressed further a Knocking sound comes and it will then accelerate. It got a whole suspension rebuild aboout 15kmiles ago. I also purchased the mobtown skids, but heard the sound prior to installing them. This only occurs on hard acceleration usually from a stop. When idling in gear the engine is being under load and is the most prone to vibrate. I recently bought the car and lately i have been hearing a knocking sound under the hood, but only when I accelerate. When I push down on the front left wheel, it makes what I would describe as a suction sound when the car bounces back up. You may have to register before you can post: click the register link above to proceed. I was revised all of this things what you advise to me, and also many other things (many hours under the car), and here it is! his knocking comes from throttle linkage. It starts around 2000 rpms but then stops around 3000 rpms. 2002 Ford Ranger. Sounded like a bag of nails actually. I checked that and it's not what's causing the knocking. The little ticking sound under the hood that is driving everyone insane, especially the owner, is the dreaded lifter tick noise. Rattling Sound When Accelerating At Low Speed. freelander knocking underneath at rear. The air mixes with the fine spray of fuel inside the engine and is then lit by the spark plug, causing a controlled explosion, which moves the pistons. The other peculiar thing is that it only happens after a prolonged period of driving. The sound will cease when I slow down, and I won't hear it until I go around 50 mph again. The front struts, shocks and stabilizer bushing has been replaced last 2 months ago. If you hear a whining or rattling engine noise from your car when you accelerate it could possibly be that your cam shaft belt is badly aligned or slipping. if i accelerate or am climbing a hill it goes away. General Description of Problem: You hear a rattling sound when accelerating or placing the engine under load. When I try it with the car cold it is not there. If anything, that's what it sounds like. It's more of the sound when you take your fisted hand and starting from an inch above a wooden desktop tap at about 1 knock per second. If you hear a light knocking or pounding sound, the noise can usually be traced back to your connecting rods. A knocking or ticking noise from your engine is a sign that something is wrong, usually because of a lack of oil. Keep in mind that car sounds are difficult to figure out sometimes, and car sounds and noises vary with temperature, road conditions, incline and decline, vehicle speeds, etc. After that I reached a stop light and then the car died, So I took out the keys then put them back in the ignition and turned the car but it struggled to start and after I began to accelerate once I had re-started the car but it made a rattling noise and. I just noticed as I was driving my car tonight that when I accelerate that there's a faint rattling noise. Page 1 of 2 - Light clattering clicking sound when accelerating - posted in Maintenance & Repairs: Hi all, anyone experience light clicking or clattering sound in their auto car when during light acceleration? The sound is very much like a manual car accelerating and upshift of gear when the speed for that gear have not been attained. Grinding Noise when raining or wet weather - posted in General Car Discussion: a loud grinding noise from the front right of the car occurs only during wet weather. Everything seems to be fine in terms of the engine because from cold start and even idle with revving the engine, there is no rumble. ford cant. I recently bought the car and lately i have been hearing a knocking sound under the hood, but only when I accelerate. My XC90 has suffered with a intermittent knocking problem from new, the sound coming from under the car, but from a variety of different places. The service guy said it might be the rubber motor mounts not being tight enough when cold. Sounds like you are exactly describing Pinging, or knocking, that sounds exactly like something is rattling. ANyway, try driving the car for several miles to get it up to temp and see if the knocking sound changes or gets quieter after the engine is hot. It can also cause a loud knock under hard acceleration and braking. Dodge Caravan - 2008 Grand Caravan knocking when accelerating - Hi folks, My wife's 2008 Grand Caravan has developed some kind of an issue. STP is a double-edged sword. I needed a car and most seem to have the 4 cylinder. This happens now for a few months. I purchased new rims and tires and had them balanced so that is eliminated. That does sound similar to my problem but the dealer has looked at the car for 2 days now and still claim they don't know what's going on. However, I have not noticed a change in performance in any way. 2012 Ford F-150 Engine Complaints, Problems and Troubleshooting. Why Is My Car Making A Knocking Noise When Accelerating? - Answered by a verified Pontiac Mechanic We use cookies to give you the best possible experience on our website. Rattling sound only when accelerating Hello -- I recently started experiencing a problem with my 2002 Toyota 4Runner (168k miles) where it is making a metallic rattling sound on acceleration. Not necessarly both, because they last a long time if the rubber boot around them is intact, keeping sand and other stuff out. I have a '10 Forester with only 8300 miles on it. There are several reasons that your car could be experiencing. I'm hearing a rattling sound when accelerating up a hill or from a stop. The idling does not bother me as much as the LOUD noise from accelerating and going up hill. Spark Knock (Detonation): Engine Knock Under Acceleration ARP October 29, 2017 Engine Related Issues Leave a comment Spark Knock is a pinging noise, rattling or knocking which might be heard while the engine is working hard under load (passing on the highway, towing a trailer, driving up a mountain, etc. Also, it isn't as much a "ticking" sound as it is a loud fast knocking sound. What causes this wear and tear on it? Also, it sounds kind of like a pop noise. This happens only when the engine is warm and happens at nearly any speed as long as I'm within the RPM range and accelerating. So the noise is only when I'm dead stopped accelerating to 5mph, then it goes away, and also if I'm in park and very lightly hit the gas it makes the same noise. The knocking quickened when the pedal was depressed. I'm pretty car stupid, so this might be a no brainer for some of you. It is also helpful to figure out when the sound occurs. When cold reach under the car and hit the bottom of the cat with the palm of your hand, it should not sound like it has rocks inside. Today the sound started only after driving for about an hour. A chugging noise could mean a blockage in the exhaust system. This is a space where subscribers. new battery and alternator is outputting at 14. I can't feel the knocking--I can only hear it. My car probably has reached 3k since the last service and oil change, most of the driving based on the freeway. Connecting Rod Noise. I recently had the car at the dealers for the recalls and mentioned this, they found nothing but I am not convinced they tried that hard. Like everyone else here, it sounds like valve clatter under acceleration, more so in 1st through 3rd gear. The sound is ONLY audible above 1st gear and begins when revs reach about 2k. But this "knocking" sound has a very definite "sound" that once you know it, it is easy to identify. Sounds like something hit from under. freelander knocking underneath at rear. I've never heard wheel bearings make a screech or grinding noise when accelerating. The tick is from the lifters and the cause of these abnormal-like sounds is very interesting indeed. ive checked the front springs, drop links, track rod ends everything seems to be ok. The service guy said it might be the rubber motor mounts not being tight enough when cold. sounds like its coming from under the drivers seat or just in front of it (almost as if its the dash). I'll agree with previous answers concerning a defective front outer CV joint. I've got 1500 miles on my 2004XC and have brought my car to the dealer two times attempting to cure an intermittent rattling noise encountered only during acceleration. My 2013 kia Sportage with 96,807 miles stalled while driving on a very busy, fast-moving street. It only seems to happen once until I slow right down then accelerate again. Year and engine size/type would help in the future. a "knocking" noise could be your lifters. I have checked the mechanic, he told the sound is called by KNOCKING. I have a somewhat similar problem: In slow stop and go drinving conditions (city) I can hear a light clunck noise when I accelerate and then another one (a bit louder) when I break and the car is about to stop (less than 5mph). 5SE @ around 87000 mi. Many times you can feel the noise in the body of the car. I had the service guys tighten all the bolts underneath 1 year ago and that didn't do anything. Everything seems to be fine in terms of the engine because from cold start and even idle with revving the engine, there is no rumble. I can also get the knocking noise to happen while power braking it. Whether it's engine knocking when accelerating or some kind of spark knock or just a general engine noise, some are more serious than others, but there's one thing that's true of them all: it's never good to leave it alone. What I noticed is that it is a common noise on any car(new or old), its like an engine knocking(the type of rattling) but it sounds like a bolt or something is loose from a bracket underneath. I've searched in a lot of forums trying to find an answer for my scenario. It only happens while I'm moving. The sound would happen whenever Accelerating even if im turning, going straight, or on bumps. The last 2 weeks ive been hearing a clicking noise. If I lift my foot off the gas, the sound stops. by Kyle McFadden. Car runs good. Car knocking at idle (In park, neutral and in gear) My car is making loud knocking noises at idle. When I accelerate, something in the underbelly of the car rattles until I reach about 25mph (ish), It only happens with my foot on the gas. Hey guys, just noticed my car knocking under heavy acceleration, kind of sounds like it's coming from underneath the car. The noise is usually heard when you hold the throttle at a steady RPM. High compression engines create more pressure on the gasoline and more heat than a low compression engine. This means that the ability to write new posts and access various member features will go away. This noise may be the symptom of inefficient combustion. It sounds usually like it is coming from the front left, but hard to say for sure. my car is a 2004 sunfire Pontiac with about 129,000 on it. Spark knocking occurs when the gasoline detonates too early and makes a rattling, pinging, or knocking sound. Sound like something came lose get ur self under the car and look for anything thats missing bolts skrews or something that can move with ur hand back n forth remember saifety first make shure u have something to hold the car like a stànd if r jack fails and wheel shoks,. Would you have any other advice what that could be? Thanks!. Hi, I just bought a new 2010 Ford Edge a few weeks ago and have only 2,000 km on it and over the past week or so, I've been noticing that when I start to accelerate I hear a "clunk" or knocking noise. 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. I was revised all of this things what you advise to me, and also many other things (many hours under the car), and here it is! his knocking comes from throttle linkage. If I coast the noise again is not there till gas is applied. I'm thinking the noise. It never occurs during low rpm acceleration or during free revs. but 5 mins into a rain, this noise comes out, when it is loud, it is quite alarming because you might think the car is breaking down any moment. I've got 1500 miles on my 2004XC and have brought my car to the dealer two times attempting to cure an intermittent rattling noise encountered only during acceleration. The noise comes from deep in the bowels of your motor. I will admit that I drove it hard on the freeway with my buddies. These are more likely to knock when first starting an engine i. It idles quietly, and can drive under 45 mph. I have a somewhat similar problem: In slow stop and go drinving conditions (city) I can hear a light clunck noise when I accelerate and then another one (a bit louder) when I break and the car is about to stop (less than 5mph). Thank You for reading I have 2000 Honda Civic 4 cyl Front Wheel Drive Automatic 102000 Km done. Finding out what is wrong with your car by feel, smell, look, and sound. In my experiance most engines are built to run pretty much the same way so think about your car engine in this case. If I slow down, this vibration lessens or goes away. So, if you hear a strange engine noise when accelerating, you’ll want to get it looked at right away before the problem potentially worsens. It happens in first and second gear. While coasting (typically above 40mph), if I accelerate hard there is a very noticeable thump then the car accelerates as normal. This is a completely different and louder knocking/ ticking than your typical cold start. It’s important to identify these confusing noises. The sound disappears after reaching 35/40 mph. I have just purchased a 2012 Acadia LT1 and am having a problem with a rattle when I accelerate from a stop. During light acceleration, or when going up hill, it is normal for some engines to exhibit a slight engine knock noise. USUAL CAUSE Engine ping is the result of abnormally high combustion temperatures. You need to see if it sends a timing retard signal. Car Problems With a Rattling Sound When Accelerating by Robert Moore Rattling noise during acceleration can be caused by several different but common failures, including loose heat shields, bad belt pulleys and ignition pinging. I have got under the car after a drive and held the driveshaft and there is back and forward play on it. Any ideas???. I need to creep the car home and park it up. THe knocking sound is very similar to what you'd get by using low octane fuel, and only occurs under load, typically going uphill. Car runs good. Knocking Under Hood When Accelerating was created by TransAmKid I have a 1979 Trans Am with an Oldsmobile 403. I remember an old car I owned that would knock on acceleration and it turned out to be the door hinge flexing on the passenger front door. no e brake, block front wheels. If your car makes a rattling noise when accelerating, it could be your engine is worn out with low oil pressure or piston slap. Would you have any other advice what that could be? Thanks!. Starting up my car which was not driven for 2 days. Tried to reproduce the noise by bouncing the car when stationary without success. Belt noise can also come when one of the pulleys the belt is riding on starts to fail. if the knock goes away or changes in sound. When do sound appear ? Driving, stationary, in carpark, during turn, driving over hump or anytime ? Stationary. The car has been perfect accept for a very nasty noise on acceleration. A popping sound coming from your engine can be bad news. When the belt no longer moves smoothly along the pulleys, it makes a noise when the car is accelerating. Hi new here and first post , I have bought a second hand Octavia 1. Hi, Driving to work this morning, I occasionally heard a knocking sound from the rear of the car, particularly when accelerating. Cars overheat most often in very hot weather. I have had the same rattle / knocking sound when driving up hills. ive checked the front springs, drop links, track rod ends everything seems to be ok. Page 1 of 2 - Light clattering clicking sound when accelerating - posted in Maintenance & Repairs: Hi all, anyone experience light clicking or clattering sound in their auto car when during light acceleration? The sound is very much like a manual car accelerating and upshift of gear when the speed for that gear have not been attained. If I coast the noise again is not there till gas is applied. This condition only happens to cars with carburetors. But if you hear a whirring sound under your car, and you find that the vehicle is pulling to one side as you drive it, chances are that a wheel bearing is shot in one or more of the tires. knocking noise from rear when accelerating. It doesn't do it when I first start driving, it waits until a little over 5 minutes after I start. Maybe I can have someone drive it while I fallow in another car and listen to try and pinpoint it. We’ll tell you what some common. Hissing or sizzling under the hood. Your car engine is making unnatural noises and you don't have the slightest idea what it could be. Have given the car into garage for a check but can not located the noise. Bruno: Link Fixed. com : Car complaints, car problems and defect information. The exact type of sound that you hear might determine the problem. He said that its a timing problem and that if i don't do it i might end up blowing my engine, i want to. Took into the dealership for service because of rough idling, loss of acceleration and a whining noise when accelerating. It is also possible that the wheel bearings or CV joints are causing the ticking sound if it only occurs when the car is first accelerating. I'll agree with previous answers concerning a defective front outer CV joint. You hear a whistling noise coming from under the hood: Check the hoses for vacuum leaks. goes away if its in park or as soon as the revs pick up when i take off again. This sound is a loud thumping maybe even knocking sound. Any ideas? BTW, it does not occur when the car is in neutral. If there’s any problems with it, your vehicle may not start. This feature is not available right now. As I said, I recently moved to higher elevations (but slightly lower temps). This one however sounds like a dieselloud clattering noise that is unusually loud at times and can be heard inside the car. When I try it with the car cold it is not there. Your engine is a finely tuned machine. The following are causes of timing gear or chain and sprocket noise:. Its very common and occurs under the conditions you are saying the noise you hear does. CarComplaints. First and second gear seem to be the worst, but the knocking/ ticking is still there in third, fourth, and fifth gears. Before we dive into the diagnosis I need to let you know that not all noises are easy to find, some are hidden in components and are not visible. If your car makes a humming noise when accelerating, it could be an issue with a. If it is happening in 3rd, 4th or reverse I can't hear it. When idling in gear the engine is being under load and is the most prone to vibrate. When I try it with the car cold it is not there. Would you have any other advice what that could be? Thanks!. Last week I noticed while accelerating at lower speeds (<20 MPH), the car makes a sound like a metal hitting metal (similar to a motorcycle) (sounds like it's coming from the front of the car at times but at other times it sounds like it could be coming from the middle of the car); however, if I let off the gas it stops. The water pump in a Lexus IS—or in any vehicle for that matter—is a vital component. Why Is My Car Making A Knocking Noise When Accelerating? - Answered by a verified Pontiac Mechanic. Most people will hear a knocking sound when there is a mechanical problem somewhere in their engine. 2 L is not made to tow a car trailer loaded with a 4runner. I recently had a noise coming from under the hood when accelerating but quit when you let off the gas. I have an 01 Corolla with 117K miles (1ZZ-FE and C59 manual trans and front-wheel drive) that makes a single clunk under two conditions:. The sound would happen whenever Accelerating even if im turning, going straight, or on bumps. It doesn't do it when I first start driving, it waits until a little over 5 minutes after I start. It is also helpful to figure out when the sound occurs. Before we dive into the diagnosis I need to let you know that not all noises are easy to find, some are hidden in components and are not visible. How to Stop a Car from Knocking. The sound has the same tempo in either gear and only under power. Like as i'm speeding up, baaaa baaba ba ba baaaaaa ba ba baaaa (3 seconds into the recording, as well as 10 seconds in). It sounds like a rock being knocked against a hard surface. Letting off the accelerator stopped the knocking/ ticking sound. When you let off the gas, it continues and maybe even gets louder. I can also get the knocking noise to happen while power braking it. Much much noise than usual, and it seems to sound like its got junk in its throat. accelerating in gear rather than revving the engine with the clutch or gearbox disengaged. FRONT END POPPING NOISE CURE. Get the car repaired yesterday! And, if the noise is really that bad, you probably should not be driving the car at all. The air mixes with the fine spray of fuel inside the engine and is then lit by the spark plug, causing a controlled explosion, which moves the pistons. When you have to make a turn, there shouldn't be any noise coming from the steering wheel. My Bmw 523i automatic has a knocking noise under the car at 2000rpm. Replaced knock sensor an problem solved. I've noticed it happening in 1st, 2nd and 3rd (only once) gear. If it sounds like a single knock, you (or your mechanic) can isolate the cylinder by disabling the spark or the fuel injector for each cylinder one at a time. For the last month or so, whenever I'm in stop and go traffic and I press on the gas pedal, I hear a knocking sound from under the car that sounds like someone shook a coin inside a can. The front left wheel area made a loud knocking noise when accelerating (fairly hard) out of a left turn this afternoon. I don't know what could possibly be the cause of this noise. I would think if it was from that TSB issue that would be one of the first things they would check. I thought it might be an exhaust leak but have found none. Hi everybody Car is a 1992 300TE with 150 kmiles. This one however sounds like a dieselloud clattering noise that is unusually loud at times and can be heard inside the car. Also, it only happens in a specific RPM range, or perhaps only under light / medium load when accelerating. put car in neutral. As you drive down the road, you probably notice certain noises that your car makes—noises you consider to be part of the regular sounds you hear. - It seems like it it worse when the motor is under load. i've had my 2005 tundra for almost 6 years. If you hear rattling under the car it could mean that the exhaust system has become misaligned. It got a whole suspension rebuild aboout 15kmiles ago. I am trying to buy the parts necessary to stop the “knocking noise under the front end over bumps”, but when I try to access your parts section as directed on your web site it tells me it is not in service. It is usually caused by an idle speed that's set too high or excessive carbon in the combustion chamber. 2 TSI DSG - Random knocking noise when accelerating - bolt : Has it got a knock sensor on it, pinking is what it sounds like from your discription, is usually controlled by the ecu,. MG MGB Technical - Strange knocking from rear end I need your expertise! For the last few months I've had a soft, but persistent knocking sound from rear end of '72 B roadster when driving over a bumpy road ie all roads these days. The air mixes with the fine spray of fuel inside the engine and is then lit by the spark plug, causing a controlled explosion, which moves the pistons. It knocks in park a little, but not as much as it does in any other gear. Otherwise, they are just cheap and [email protected] I have had the same rattle / knocking sound when driving up hills. I picked up my 09 on dec 9 2008. Typically, if this is the cause of the sound, the noise will increase when the wheel is turned during acceleration. Not to slam to Toyota but I wonder if this should have been a recall…. This sound began after some NASTY pot holes on a road which I don't drive on from now on. Knocking from the engine compartment. Your car can vibrate, shake, and create various types of noises for different reasons. The first step to determining what is causing the sound is to isolate where the sound is coming from. No matter the cause, if you’ve noticed this sound it’s time to schedule a visit to your. Page 1 of 2 - Knocking noise while idling, but goes when accelerating - posted in Diesel Engines (Mondeo Mk3): Hi Ford people I have a 130 2. - If you rev it up quickly (pushing the pedal down fast from idle) you can hear it. It literally sounds like a cold diesel engine knock. During moderate to hard acceleration, I hear what sounds like a knock coming from around the transmission tunnel/shifter. knocking noise from rear when accelerating. It's more of a click/cracking sound that a clunk. If the knocking happens when you turn the steering wheel when the car is not moving then there is a problem with the coil springs that form part of the front suspension. Knock/Bump when accelerating from a full stop I got a 2008 Tacoma 4x4 Crew cab and I noticed a bumping/knocking sound when accelerating from a full stop. Much much noise than usual, and it seems to sound like its got junk in its throat. There are several reasons that your car could be experiencing. It also be caused by problems in your car engine! Any of these car issues could be quite expensive, so make sure to get to your local automotive repair shop as soon as you can. A popping sound coming from your engine can be bad news. if the knock goes away or changes in sound. Keep your vehicle's engine performance and efficiency strong by taking care of engine problems right away. 2012 Ford F-150 Engine Complaints, Problems and Troubleshooting. Sounds like its coming from drivers side. The battery can be located under the carpet beneath the area where the passenger foot well, you need to ensure all electrical devices are off, lift the carpet and remove the foot support (usually secured by 2 fasteners) by sliding it out of the car sideways, first unscrew the negative then the positive terminal. The bearings are. Rattling noises can either be a simple fix or an impending sign of a serious problem. on dry weather, there is absolutely no such sound no matter how i whack the car. Fabia Estate (2010) Mk 2, 1. Knocking Under Hood When Accelerating was created by TransAmKid I recently bought the car and lately i have been hearing a knocking sound under the hood, but only when I accelerate. What causes the lifters in the engine to make this sound? That has. The car is only 6 months old with 7k miles. It sounds usually like it is coming from the front left, but hard to say for sure.