You can hear it go bum bum and it feels like my car brakes just slam and there’s like a very quick delay before it speeds up. I am getting a weird noise coming from my saab. It only happens when I run the AC and only while accelerating, almost like as plastic parts get cold something contracts and causes the vibration noise. Why is my engine making a knocking noise? I was able to fix mine for FREE $0! 🔧🔧🔧 (Spark Plug Tools) Torque Wrench -. The steering knuckles and control arms are able to sustain movement with the help of ball joints. NO excessive oil or water usage, everything is as fine. Sounds like it is coming from the left front, Possibly from the area of the front differential or L. I hear a slight metallic rattling noise coming from the front of my car when I accelerate. Engine Knock. but its still there. Sound as if something is loose, I have inspected the muffler, other areas. DIAGNOSE – ENGINE PINGS OR KNOCKS ON ACCELERATION. I will try and listen to the sound more closely, but it doesn't seem like it makes it going over bumps, in which case I doubt it would be anything to do with the strut mounts. Water hammer is a knocking or banging noise in a water line that occurs when the water valve opens and closes. So KR is important to fight. Now its loud and much worse hot. I know the NA advertised unleaded regular but it also states that light knocking while accelerating or driving up a hill is normal. There's play where the drive shaft goes into the rear end, but I've been told that a little bit play is normal I don't have an excessive amount of play but it is they're up down. This noise is loudest when the engine is under heavy load. I have a knocking sound coming from the rear when I drive over a speed bump or come to a stop. 0 w/ CVT tranny & 55,000 miles. When you accelerate it starts humming loudly like the engine is revving up or like it isn't shifting properly. I have tried to isolate it, and I don't believe it's an engine noise. The clunk will happen almost immediately upon acceleration. You're tooling along on your way home from a cruise night or a car show when you pull up to a stop sign. Car warms up knock, knock. When I am accelerating from a complete stop I only hear it once. The engine being hot or cold doesn't effect it any differently. Not sure if the noise stops when driving, can't hear over the road and engine noise. The alignment is perfect and the tires are brand new. Hopefully, your problem is the first type I've listed below! 1. Engine knocking is a very common issue that many car enthusiasts deal with on a regular basis. The biggest change for 2011 is a new model, the i Touring, which adds equipment to the base model with the 2. A clunking sound, when going from acceleration to deceleration or deceleration to acceleration, may be caused by slip yoke problems. I thought I was coming from the clutch fan because it doesn't occur when I let off the gas, only with my foot on the gas. The knocking isn't engine knocking by the way. Re: Clicking noise during acceleration and decceleration Mon Apr 01, 2013 9:12 pm So from what I understand an issue that will probably end up impacting every LEAF is a clunking sound which occurs just once when changing directions (forward to reverse and reverse to forward). We are not so sure of that. Immediately back off the throttle and only use low rpm engine speeds until you can get the engine investigated. This noise will stop in a few days once the gasket becomes more pliable. Hopefully, your problem is the first type I've listed below! 1. MG MGB Technical - Knocking Sound @ Threshold RPM Greetings, I'm looking for some opinions on where to start with a problem I am having with my 1972 MGBGT with a 1978 engine. This will cause knocking when you brake and go over certain bumps. When we pull up to a stop sign or stop at a red light then accelerate when it is time to drive, the vehicle makes a sort of clunking noise. any information or ideas as to what this might be would be really helpful and greatly appreciated: I proudly own and drive an automatic 1995 Camry I-4 DX sedan and when I start accelerating from a complete stop I hear a small clunking/knocking noise coming from a place where I can't determine right as the car starts to move. Ending engine tapping noise. When I am driving, this just started happening recently, and I can't think of a situation that could've caused it. Some 2001 – 2003 model year Highlander vehicles equipped with a 1MZ-FE engine may exhibit an intermittent “pinging” or “knocking” noise when accelerating slowly up a grade. So for about a year now I've been hearing a knocking sound while in drive but stopped at a light or stop sign. That's how much I hated the sound. Knocking from the engine compartment. If your car makes noise when accelerating. I only notice it when I hit the gas hard. If requires the engine be shut off to happen. Sounds similar to what was going on with my car. When you accelerate it starts humming loudly like the engine is revving up or like it isn't shifting properly. A noise that doesn't become any louder, but becomes more and more noticeable. Experience has taught me that by the time something makes a noise on a Land Rover that it shouldn't be, it's already time to replace it. this happens when taking off from a stop and seems to go away at about 30 mph not sure if it is a knock. Unburned mixture and the end gases at the edges of the combustion chamber are being raised to extremely high temperatures as the advancing flame front compresses and heats up the mixture directly in front of it. What to Do When Your Hard Drive Is Making Noise The very first thing you should do is make sure the hard drive is the actual source of the noise and not a different hardware component. Thump Bump Clunk When Accelerating While Coasting when they come to a stop or accelerate from a stop. A local auto shop told me that it was due to a broken heat shield, but repairing that did not stop the. So KR is important to fight. Knock sound when accelerating from stop. It could also be described as a popping or clicking. Its not constant just as I accelerate the first few seconds from a dead stop. I hated that my original 11 mdx sounded this way. It's almost as if something isn't tight and once I hit the gas it sounds like something locks into place or a piece of metal hitting against another piece. Today for the first time since this all started, I also noticed that unless I'm not accelerating at all, I. Hi All, I have some nasty knocking sound when accelerate and ascending with my X5 X5 E70 2007 auto diesel. The misdiagnosis is that the valve job gave the engine too much power making the aged bottom end fail. This is especially true when you turn at lower speeds. Please try again later. The car sounds fine when you turn on the ignition. The first is belt noise. This may be related to a faulty throttle position sensor or potentially a dirty or failing mass air flow sensor. Once I accelerate, I hear the noise for a few seconds. Pinging can be anything from a loud knocking noise to a soft tinkling sound that is emitted from the engine. I can also brake torque it to duplicate. It sounds like metal agains metal rattle, exactly like a loosen heat shield, and i can't figure out where it comes from. Rattling Sound When Accelerating At Low Speed. I have taken my car to the dealer 6 times but they haven't been able to fix the problem. Some 2001 – 2003 model year Highlander vehicles equipped with a 1MZ-FE engine may exhibit an intermittent “pinging” or “knocking” noise when accelerating slowly up a grade. Worn mounts will allow excessive movement of the engine causing either the mount to make noise from metal to metal contact upon accelleration or possiblly something else touching during accelleration. What can be done to stop engine knock or pinging? How can you stop an engine from knocking? cars can make weird noises. Goes away when you use premium fuel. If I let off the gas the sound goes away almost completely and I somewhat hear a roaring sound. How to Stop a Car from Knocking. this only happens from a stop and on hard acceleration. Squealing Noises. It happens when the weight of the vehicle is transferring to the rear upon acceleration. USUAL CAUSE Engine ping is the result of abnormally high combustion temperatures. These common car noises can spell trouble and cost a lot of money, especially if ignored. This may be caused by a loss of clamp load at the joint that attaches the propshaft to the transfer case. This would sometimes/often be accompanied by a loud knock or two. From a dead stop, nothing is wrong. The first is belt noise. Depending on your vehicle, manufacturer recommendations, and mileage, a maintenance tune-up may be just what your car needs. Since then the driver's side wheel has also worked loose. Knocking noise when accelerating from stop, motor mounts??? If this is your first visit, be sure to check out the FAQ by clicking the link above. My pacifica is making this horrible noise, it literally sounds like its going to blow up. Re: Engine knocking noise when accelerating Reply #14 on: May 08, 2015, 05:07:30 PM Yep, the sound file is clear: you can modulate that knock with the throttle, which strongly suggests a significant mechanical fault, which could be anything from a knackered big end to a cracked piston. I started having the exact same problem as being described in this thread. Since taking it home, I've been noticing a "pop" when I accelerate from a stop, whether I'm driving straight or turning either direction. This feature is not available right now. I used the BGK 44k fuel ingector cleaner about 6 weeks ago. That's how much I hated the sound. Like if I took off from a stop, everything was normal until my speed started catching the fuel I was applying, then it would sound like an AK47 going off under my hood. When the truck heats up and I start to accelerate there is a knocking/clicking sound, sometimes loud sometimes quite, coming from under the car. The steering knuckles and control arms are able to sustain movement with the help of ball joints. The pistons can also wear and make noise. Slightly mechanical, slightly echoey and you just can't put your finger on it. I cant hear it when I open the hood and push on the throttle only when in the car with the windows up under acceleration, not at a stop or when coasting with foot off of gas. A pinging noise on acceleration is a symptom of pre-ignition. If it sounds like a coffee can with marbles in it, shaking around it might be pre-ignition. I have just purchased a 2012 Acadia LT1 and am having a problem with a rattle when I accelerate from a stop. It think it is usually aroung 1000-1500 RPMs and then it goes away. Good high octane gas usually keeps KR to a minimum. It stops instantly when the engine is turned off. If I were to start the car right now and drive away it would not make the noise. In most cases, diesel purge will quiet all the noises related to your injectors and will soften up the knocking noise as well. I had the sway bar taken off but it did not solved the problem. It's only in first gear, and it's only when accelerating from low RPM. At one point, it sounds like the knocking noise nearly disappears. Loud knocking banging noise on 350 Chevrolet that comes and goes still drives when making noise but everytime accelerate it starts banging. I have tried to isolate it, and I don't believe it's an engine noise. Your timing belt might whine while idling, and actually stop whining after you continue accelerating, only to return once you slow down. Re: Engine knocking noise when accelerating Reply #14 on: May 08, 2015, 05:07:30 PM Yep, the sound file is clear: you can modulate that knock with the throttle, which strongly suggests a significant mechanical fault, which could be anything from a knackered big end to a cracked piston. I have already thought it to be a knock sensor, but wouldn't I get a code for that and a check engine light?. No whining noise. As the the title states, I've been experiencing knocking/pinging noise during normal acceleration. Sounds like it is coming from the left front, Possibly from the area of the front differential or L. The only time we have been able to get the rattle is when the car is actually moving while accelerating from a stop. A noise that doesn't become any louder, but becomes more and more noticeable. At first we thought it was the air conditioning compressor which is giving trouble, but it does it when the air is off too. When accelerating in first gear, from a stop, I hear and feel a knocking noise from the clutch/shifter pedal area. Timing may be off enough that knock sensors can't compensate. If your car's engine knocking has you stumped, stop by your nearest Firestone Complete Auto Care and let our technicians get to the bottom of the noise. A loose chain can slap the "ceiling" of the chaincase, causing a knocking noise. It could also be described as a popping or clicking. I get a grinding sound from the back when accelerating from a stop, maybe about 10-15% of the time. Getting worse and annoying. That's how much I hated the sound. It's not really loud, just a faint chattering noise (similar to if you were to test a spark plug out of socket). As the bearing wears out it will allow movement and that play will sound like tapping or clunking depending on how bad it is. If an engine has a tendency to ping, it usually becomes first audible when operated in the lower rpm range and during acceleration. As soon as I release the pedal, the noise stops. Whining noise while accelerating seems to be one of the most commonly faced and most discussed problems on automobile forums worldwide. The knocking occurs when driving on rough areas of roads or going over speed bumps. When I am driving, this just started happening recently, and I can't think of a situation that could've caused it. Just started noticing a new sound from the engine compartment. GM notes that this is a slight movement that is more often seen visually, rather than felt, when viewed from the outside and using the auto-start feature, if equipped. When accelerating moderately from a stop after braking moderately to come to that stop. Robert-Thanks for your question about the humming noise in your transmission. I have heard of many people putting less than 91 octane and then getting a knocking sound in the engine. For instance, when a transmission is making a whining noise. Connecting Rod Noise. What if you stop, put the transmission into park, then drive, does it reoccur?. It also appears to stop when its raining! If you rock the car from side to side or forwards and backwards to noise doesn't happen. It's not a faint noise. 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. Hello, My Octavia Estate 2. 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. So two weeks ago I put a bottle of seafoam in it and filled it up with E85, knock went away completely, so next time I filled up I went back to gas, and so. If I put it into neutral the noise basically disappears or gets much quieter. 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 been having a problem with some type of knocking noise when I am moderately accelerating from a stop. The noise sounds like a tapping or rattling sound that begins when the engine is started and the car is not moving. Kind of like a metallic, bird noise that sounds kinda bubbly like water? I know, that's weird, but I don't know how to describe it but I'm sure other people have had this sound before. Thump Bump Clunk When Accelerating While Coasting when they come to a stop or accelerate from a stop. Knock seems to go away as the engine RPMs go up. not so much with the acceleration but the stopping. A pinging noise on acceleration is a symptom of pre-ignition. This happens. SYMPTOM SUMMARY The engine “pings” or knocks on acceleration. Since taking it home, I've been noticing a "pop" when I accelerate from a stop, whether I'm driving straight or turning either direction. This sound seems to be coming from the front left side of the car. Sound as if something is loose, I have inspected the muffler, other areas. Squealing noises are actually quite common when it comes to your car, sometimes it can be something very simple and others it can mean you’re in need of a major replacement. I showed them to all the experts and no one had a clue. It seems to happen more often when I accelerate fast (not flooring it or anything). It's only in first gear, and it's only when accelerating from low RPM. A worn or damaged tie rod will create a knocking sound. Knock when accelerating from stop He guys, my JLU Ribicon recently developed a slight stutter/knock when accelerating from a stop. You may even discover that your local college or art festival has some reasonable yet exclusive materials, that could be perfect for your space. When I accelerate, I tend to hear a "knocking/pinging" noise coming from my engine. Since then the driver's side wheel has also worked loose. -ticking starts normally as soon as it's in gear F/R -doesn't get louder or worse when driving or. This morning, leaving from work I noticed the sound as I've noted - accelerating from a stop with fan/AC on. This is especially true when you turn at lower speeds. Engine is very strong on hard acceleration, but on light acceleration it misfires, also rough idle and smells way too rich. No whining noise. Hello everyone, I need suggestions on the possible culprit of the engine knocking I am experiencing. When the car is on the move, the knocking sound and the feeling not so obvious but when the car come to stationary or stop and when you try to turn you can feel that there's a strange feeling when u try to turn either side. Both sound very similar. if i am at a standstill and give it half throttle or more, something makes a loud knocking/ticking sound in the engine. Also happens when letting off the accelerator to. Engine Clicking And Tapping Noises problem of the 2011 Chevrolet Equinox 30 Failure Date: 09/23/2011 Concerning 2011 chevy Equinox 4cyl, on startup, there will be a loud knocking noise, sounds as if there is no oil in the engine, sound lasts from 1-5 seconds then goes away. also could be valve knock, but you should be able to reproduce that in neutral. It seems to go away when I hit "cruising speed", but can anyone help me out before I ask my mechanic? Is this a maintenence problem, or a REAL problem?. This morning I was making an 80 mile drive on the interstate. Like if I took off from a stop, everything was normal until my speed started catching the fuel I was applying, then it would sound like an AK47 going off under my hood. com : Car complaints, car problems and defect information. A low rumble or knocking noise could be caused by a bad rod bearing on the crankshaft. Pretty much what the topic says. I have been getting an engine rattling noise almost sounding like a diesel noise from my engine when ever I accelerate (slowly, not gunning it). It happens whether I accelerate hard or easy. Clunking, buzzing, growling, grinding, or humming sounds and vibrations coming from your transmission are not good signs. Noise came up after about 800 miles on the BB/cam build. Thumping Noise In My Brakes When I Stop. Have you got a fueling box on your truck? When my original TST was faltering, my truck would rattle like crazy, not so much while accelerating, but just after. Acura traded me for another 11 mdx. I've got an 02 4wd, automatic. The noise is usually heard when you hold the throttle at a steady RPM. 0 5400 KM Hey guys, I have a brand new Tucson AWD, purchased the vehicle in March 2017. The engine being hot or cold doesn't effect it any differently. The engine is suffering a bona-fide misfire condition, but no misfire codes are registered in the computer's memory (if OBD II equipped). I had the sway bar taken off but it did not solved the problem. As soon as I release the pedal, the noise stops. There have been complaints that some Ford vehicles equipped with a 4. I hear the noise right around when i get into 3rd and then once I hit cruising speed I don't hear it. With so many car parts working simultaneously, it's difficult to figure out where exactly, is the whining noise coming from. Its going into Stechnic, the noise is very stutle and engine revs and drives normally. Worn mounts will allow excessive movement of the engine causing either the mount to make noise from metal to metal contact upon accelleration or possiblly something else touching during accelleration. When i leave my drive way i have to turn and lock the steering to make the turn and when i am pulling off to go down the street as the steering wheel returns to center i hear a knocking sound tought it was a one time thing but i hear it all the time. 2004 - 2008 F150 - "Clunk" when accelerating from complete stop - I've been living with a mild clunk or bump in the drive train when I would first begin to accelerate from a full complete stop. Recently did an oil change last week as well as new air filter. So I do not think it is the exhaust manifold. Sometimes people use an additive to the differential oil that makes the noise quieter. Lately I've noticed from a stop if I accelerate hard there is a metal popping sound under car. It's only when I have my foot on the brake and am at a complete stop. What can be causing it?, But the noise is noticeable when the engine warms. 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. It's not a faint noise. There’s one more symptom that comes along with a shaking vehicle-a grinding noise. Some keep theirs over full to get rid of the noise. When I take my foot off the gas to shift, the knocking starts and continues until I'm in gear and have my foot on the gas again. I also hear it over bumps. As soon as I take my foot off the brake and the car starts to move forward, I hear the sound again. When I stop on an incline and then accelerate, I hear a water drop noise. Re: Knock sound on acceleration from stop Mon Oct 27, 2014 4:52 pm I noticed when coming down the hill from my house in the morning sometimes I get the same - it seems like when transitioning from regen to actual braking there is a little bump then a little push - wondering if it was just a quirk with the car - doesn't happen all of the time. Knock is normally associated with diesels. I have checked the mechanic, he told the sound is called by KNOCKING. Car runs good. What it ended up being in my case was a broken exhaust bracket, the one right under the engine had snapped and was letting the downpipe smack off the subframe. any information or ideas as to what this might be would be really helpful and greatly appreciated: I proudly own and drive an automatic 1995 Camry I-4 DX sedan and when I start accelerating from a complete stop I hear a small clunking/knocking noise coming from a place where I can't determine right as the car starts to move. Damaged or worn main bearing noise is revealed by dull thuds or knocks which happen on every engine revolution. Cause A slip/stick condition between the transfer case output shaft and the driveshaft slip yoke may cause this condition. Just started noticing a new sound from the engine compartment. Some noise can come from a worn camshaft. But I recently changed my tires to winter tires and about a week after doing so, I noticed that whenever I am driving without using the gas or braking, just coasting, there is a knocking sound coming from one of the front wheels or the axle. At first it sounded like a bad catalytic converter,but that is fine. padel and let the car moves first, after that, i release and press harder the acc. I initially thought it might be the transmission slipping. Hey folks, my truck is almost a whole two weeks old and I'm now worried there is an issue with it. Does it gear and never in neutral or park. 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. Have a 2003 2. does it have anyth. With so many car parts working simultaneously, it's difficult to figure out where exactly, is the whining noise coming from. Robert-Thanks for your question about the humming noise in your transmission. Could the cause of this be that the hardy couplings on the prop shaft are worn out, that the support bearing on the prop shaft is starting to go, or am I looking at something more expensi. So two weeks ago I put a bottle of seafoam in it and filled it up with E85, knock went away completely, so next time I filled up I went back to gas, and so. In the lines below, I will talk about the best oil additives that can stop engine knocking pretty much instantly. No problems during regular driving. Rattling Sound When Accelerating At Low Speed. Also happens when letting off the accelerator to. This sound is often most noticeable when the engine is at an even rpm-not accelerating or decelerating-and is often caused by a worn bearing or crankpin, misaligned connecting rod, or lack of oil. The unlubricated, damaged rollers then produce a grinding or squeaking sound, as they operate on the scored cap and cross surfaces. Its not constant just as I accelerate the first few seconds from a dead stop. what in the rear end could have affected it. It's very quiet - no one would notice it except me and maybe someone very attuned to Teslas, or listening for it. Hello, My Octavia Estate 2. everything i know about my bike ive pretty much learned by lurking around this forum. Im bringing it to the SC but wanted to insist on replacing the right parts if i know what parts that is dt22cc | February 14, 2019. Depending on your vehicle, manufacturer recommendations, and mileage, a maintenance tune-up may be just what your car needs. When I would start up the truck there is also one or two clicks. It is one click/clunk and thats it, until I stop and pull away again. There have been complaints that some Ford vehicles equipped with a 4. So for about a year now I've been hearing a knocking sound while in drive but stopped at a light or stop sign. i know when i am at high speed and i have to come to a hard stop i notice that i hear a sort of knocking sound but lately i have been paying more close attention to my gear and mph match up and i dont hear it as often as i did. This would sometimes/often be accompanied by a loud knock or two. Clunk from motor when going slowing down and accelerating + whining noise at 65+mph. This noise may be the symptom of inefficient combustion. This feature is not available right now. A knocking or ticking noise from your engine is a sign that something is wrong, usually because of a lack of oil. A few other things to narrow it down:. But if I drive it a while while on cruise or a slight hill climb I can hear it. Hello everyone, I need suggestions on the possible culprit of the engine knocking I am experiencing. When it is in park or neutral, the engine is not transmitting the torque to the mounts/engine cradle. Loose flexplate/converter bolts make a nasty sound similar to a rod knock, but immediately go away as soon as you try to accelerate the mass. Its a 2003 FLHT. At least 10hp is going out the window. Asked in Harley-Davidson Motorcycles. Knocking (or 'pinging, pinking or pre-ignition) is usually cause by incorrect ignition timing or by using fuel with an octane rating that is too. It looked like it was meant to do this and I did not see how it could make that much noise. 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. 0 TDI 4x4 is making a knocking sound when I accelerate hard in gears 4, 5 & 6. Still wondering whether I have the same problem. But if I drive it a while while on cruise or a slight hill climb I can hear it. Re: Clicking noise during acceleration and decceleration Mon Apr 01, 2013 9:12 pm So from what I understand an issue that will probably end up impacting every LEAF is a clunking sound which occurs just once when changing directions (forward to reverse and reverse to forward). CarComplaints. The sound is different in cars I have owned in the past in that a lot of the high frequency sound is muffled. I showed them to all the experts and no one had a clue. Many things cause pre-ignition and correction always depends on finding and correcting the cause(s). Acura traded me for another 11 mdx. I have the problem of knock in my engine when accelerating. If you are sure the noise is coming from your gear box and happens even in neutral, then the output shaft bearing in your transmission may be starting to go bad. While the most likely reason for a refrigerator to make a knocking sound is the compressor, the condenser fan might also make noise. It almost sounds like a clattering or the sound of castanets. And when I come to a stop It will stop making the noise. Average failure mileage is 60,000 miles. Worn suspension parts can also be a cause of a knocking sound when braking. Engine Clicking And Tapping Noises problem of the 2011 Chevrolet Equinox 30 Failure Date: 09/23/2011 Concerning 2011 chevy Equinox 4cyl, on startup, there will be a loud knocking noise, sounds as if there is no oil in the engine, sound lasts from 1-5 seconds then goes away. I had the sway bar taken off but it did not solved the problem. Zen I have a Honda civic 2005 that makes a single clunking noise. I can also brake torque it to duplicate. It disappears when I stop accelerating or sharply reduce my acceleration. There are a few reasons engine knock is so confusing. I can replicate it when I am at a stop and need to make a turn. Each time i speed up, its the noise you hear. Polyether Amine It can help clean a vehicle's combustion chambers, reduce engine knocking and pinging, remove harmful sulfur deposit from gas gauge sensors and relieve cold-startup issues. I never used to hear that inside the car. One of those noises that drives you nuts trying to get a handle on what it could be. 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. On the way back home, when I came to a stop, it idled so bad it was shaking the entire car, when I goosed the accelerator in neutral, it ran fine again except for the knock. My 2004 Expedition 5. The 2010 Ford F-150 has 9 problems reported for clunk when accelerating. I'm getting a knocking sound, especially during braking (most noticably just before coming to a rest), and its also there when taking off again, happens only initially when I move. There have been complaints that some Ford vehicles equipped with a 4. It happens randomly, some days it barely makes any noise and others it does it a lot. Getting a knocking noise when accelerating or decelerating slowly, particularly noticeable when in very slow stop-start traffic < 20mph. #6 – Bad Ball Joints. The "lower control arm" bushings can wear to the point of actually tearing apart, and then the whole front wheel assembly can move back and forth when you brake and accelerate. Download and buy high quality Car Knocking sound effects. I don't notice anything other than the sound, other than sometimes being able to slightly feel it under me when it makes the sound. this is an old subject but my 01 tahoe is making that same pop noise when accelerating from a stop. Why is my engine making a knocking noise? I was able to fix mine for FREE $0! 🔧🔧🔧 (Spark Plug Tools) Torque Wrench -. But if I drive it a while while on cruise or a slight hill climb I can hear it. My pacifica is making this horrible noise, it literally sounds like its going to blow up. Of course, each time I have had a mechanic in the car, it does not rattle. I hated that my original 11 mdx sounded this way. Download and buy high quality Car Knocking sound effects. It was a noise we chased for some time, but didn't find the culprit until the suspension was disassembled. 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. When they replaced the belt they left the knock sensor wire loose, it rubbed on the serpentine belt and cause my truck to have stutters, Extreme loss of power, lots of engine knock, stall out and left the truck undriveable. 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. Whenever you got up to speed it stopped and didnt make noise anymore, but now its louder and does it more. I have checked the mechanic, he told the sound is called by KNOCKING. Today the sound started only after driving for about an hour.