Knocking Sound When Accelerating And Decelerating

Thanks everyone for all your advise and help :D. As I decelerate from about 55 mph to 35 mph there is a grinding sound that sounds like plastic is being held up to my tire tread. Rattling noise from the engine only under load/acceleration. It has caused the engine to raise up when shifting to reverse, as well as creating a loud clunk noise when I shift to reverse. I have a metal clunk/knock sound upon moderate acceleration. The exhaust system includes. If I were a gambling man, I would bet it is the active rear motor mount. This is my second Expedition and I noticed a similar sound with a 2000 model. Don't hesitate to visit Firestone Complete Auto Care at the first sign of engine problems. Knocking on acceleration and deceleration. Normally, the engine will barely make any sounds as it runs. HOW TO DIAGNOSE ROD KNOCK WITH A SCREW DRIVER. Sam, its tough to say cause it's not that loud. Acceleration & deceleration (coasting & braking) are adjustable separately for ech gear to ensure maximum realism. 10 week old 2014 Laredo 4x4 have an issue when driving at highway speed when I or the cruise control decelerate I hear a whistle sound. On a lean mixture under acceleration you are describing a noise known generally as 'pinking' - clicking as in rattling. ludacraig, does the clicking sound like heat shield rattles? mine sounds like metal rattles in front of the passenger side when accelerating during low rpm for every gear and decelerating without braking during slow speed. i brought it to the dealer a few times but they kept telling me they don't find anything wrong. 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. Ill be checking my engine mounts, tranny mount and body mounts in the next couple of daysLuckily I do in fact have some "ass behind me"(220lbs) so Ill try and manhandle the tranny into showing its weak spot. The noise will sound as though it is coming through the air cleaner, however this is a normal condition. Updated on January 26, 2019 I don't hear any sounds until I take it close to 50 mph and let off the gas pedal, in which case I will hear a knocking sound. I pulled the valve cover off to check the CCT (it has the factory one on it, with close to 35,000 miles on the engine). its vibrating and making a rattling/rumbling noise when the accelerator is held down. It seems to be coming from the front of the vehicle (roughly from the engine bay if I had to guess). 4 enjoy, and now when I brake at slow speeds (20-30mph) there is a knocking sound. Knock: Typically a warning that something can’t hold on any longer. Some noise can come from a worn camshaft. :banghead: So, the problem is, when it's in any gear and slowing down without any gas or clutch pressed, it will make this slight grinding/deep whining noise from the driver side front. You could also drive another duramax and see if it makes the same noise on acceleration. Is it noisy accelerating or decelerating? Braking or crusing? On idle, when you change gear, when you depress the clutch or turn the steering wheel? This can narrow it down to the vehicle system involved. As soon as I release the pedal, the noise stops. When decelerating the load is reduced from rotating parts and any excessive clearance can cause noise, the only other thing I can think of is that this is a differential problem, so you should have it checked by a mechanic that is. Doesn’t do it on deceleration, so I don’t think it’s rod knock. Any ideas?. I believe it might be something loose in the passenger door or dash area (behind the. The knock does increase in temo when accelerating and deceleratingso I am sure it is a rotational parti. It sounds very much like an exhaust leak. found a ton of info but it seemed like alot of it might not have to do with what my problem is. BTW, the car has been to the dealer twice already for this. The feel of the vibration is as if the wheel is flapping about and. It's not really loud, just a faint chattering noise (similar to if you were to test a spark plug out of socket). Only happens when you rev the bike, as the rpm’s lower and right before idle, you hear a slight knock. When using a steel rod held up to my ear to try to localized the area, it is the most severe when the rod is on the aluminum timing case cover. The old tires were cupped. Loud enough to sound like having glass packed mufflers on the inside of the car. Sounds associated with flexplate/converter or flywheel issues include a rod-knock type sound due to cracking in a flywheel. Noise will be detected the loudest at normal driving speed, when not pulling or decelerating. Since a few months i noticed a slight clunking noise when i start accelerating or decelerating. It is more apparent when changing gears when the accelerator peddle is let go and then pressed when gear is engaged. It will return if I press the accelerator lightly while on the road. With a wood stick to the ear, the noise was loudest at the generator. Most front axle or transfer case noises won’t increase. Lexus LS 2007+ :: Transmission / Engine Noise When Accelerating Decelerating Between 1000 And 3000 Rpm. 302 Engine and the Mazda 5 speed manual transmission. Why Does My Car Make Noise When I Accelerate? When your car is accelerating the engine is working hard to push your car faster and faster so the noise you are hearing may be normal sounds. If I let off the gas at all, the noise immediately stops, irrelevant of RPM's or driving speed. 2004 Yukon vibration type noise on decel and acceleration I have a vibration type noise when slowing down below 20 mph and it goes away when i shift into neutral. I stopped the car thinking the wheel was about to come off. if they get worn they make a knocking sound because of the. Unique "virtual clutch" allows to rev the engine below an adjustable ESC output speed. Making it really hard to pin point a source. I was told it was a lean knock. Knocking only while decelerating??? Issue i have is around. Pretty much what the topic says. I have a 2003 CR-V with 107k miles on it and have developed a vibration on what seem to be the near side (LEFT). What could cause the whining sound my car makes when braking in reverse? Normally the brakes “get used to” being used in the forward direction - disc brake pads will move to one end of their travel within the caliper. Today it has gotten way louder. So what all is involved in fixing it? are my gears themselves still ok or will i need to replace alot of shit while im in there? Im laid off and have planned on selling the truck soon, so. Usually cam chain noise is loudest on deceleration with the bike in gear and the throttle closed, but can still be heard on the gas. 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 truck is a old Swift truck. Like problems in acceleration, defective fuel pressure regulator can also cause issues when decelerating. I first thought. Broken mounts may also result in a clunking noise when accelerating and decelerating gently. When decellerating from about 10 to 15 mph, the noise starts. Clunk from motor when going slowing down and accelerating + whining noise at 65+mph. Check for loose air cleaner parts and things underhood. While test driving I did hear one knock but thought it was a pothole or something. The clunk sounds like it's coming from the area of the. My 2002 Honda Accord with 82500 miles on it jerks a bit when accelerating. I have a 2001 Outback H6 VDC, automatic transmission. Some noise can come from a worn camshaft. Clunking noise in front end under acceleration or deceleration. 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. I am concerned because there is a TSB on this particular vehicle that has something to do with the propellor shaft which claims some very similar symptoms, but I'm hoping its the wheel bearing because my car is not under warranty. 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. This is my second Expedition and I noticed a similar sound with a 2000 model. Mine were vibrating at 100k and slowly got worse until I replaced them at 128k. Alternatively, if the rear transmission is bad in a rear-wheel-drive vehicle, the noise will occur when letting out the clutch in reverse as the tail shaft of the transmission rises up and slams back down. Now, let's look at the most common causes of knock. When I start accelerating again, it starts again. i've noticed the sound around 35 mph, 45. I believe it is also the culprit of the vibration in the car. A knocking noise can occur from worn engine mounts. Weird one only clunking once whilst start of acceleration. I had the same issue at 90kph. I have a 2015 Ecoboost. IMO the noise is coming from the lower part of the engine compartment (tranny tunnel area?). Since then the driver’s side wheel has also worked loose. Accelerator cable for mcculloch chain saw. So the piston could be slamming that chunk of carbon against the head, causing a knock. Wheel bearings are also a common suspect and may be failing. He put the new ones on and i left the garage and STILL am getting the cracking, popping noise when I start from a complete stand still and accelerate. Could any of these. Similar to a rock stuck in your wheel or brake. It has been going on for around 3 to 4 months with no or at teh most, a minor increase during that time. Normally, the engine will barely make any sounds as it runs. Diagnosing Whining Noise When Accelerating. If it's a front wheel drive a CV joint could be going. My guess is the difference is with the fuel injection mapping at the low rpms. So once the Rpms fall to 1200 or so there is no more noise. BMW Vibration and Thumping or Shaking While Accelerating - Center Bearing or Flex Disc. The noise is a lot less when the A/C is off. These loosen up over time on these inline motors due to their reverse-flow design. Download and buy high quality Engine Knocking sound effects. It doesn't happen every single time, but it happens very very often. Clunk /Driveline. It hapens every time you take your foot off the throttle and when and accelerating very annoying have checked everything for tightness. I drove the car last night. Since then the driver’s side wheel has also worked loose. We have a 14 LML duramax in the family and it has been smooth and quiet (for a diesel). 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. At first, i thought i had a bolt or something stuck in my tyre or a small rock. I believe it is also the culprit of the vibration in the car. So locate a flat level road that extends for several miles. I think it is worse when the car is cold and before warming up but not quite sure. Just put on ProCal and Mishimoto clone intercooler. I don't lose power if I had to accelerate, but because the cabin is so quite I can hear every little thing from the engine. The sound occurs in 3rd, 4th and 5th gears while accelerating at a non-aggressive pace. To advertise, contact our sales department by calling (650) 948-9000 or email [email protected] 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. 0 DURATEC with a 5 speed and around 65,00 miles. The noise became less obtrusive when on a long run and the exhaust got very warm. ludacraig, does the clicking sound like heat shield rattles? mine sounds like metal rattles in front of the passenger side when accelerating during low rpm for every gear and decelerating without braking during slow speed. Thanks in advance!. I have noticed a clunking noise after I accelerate and lay off the gas also when decelerating then letting off the gas. Thanks for the response on the KNOCKING issue. I was out towing with the subruban last night, everything went great. Description of this sound: Although the engine should. basically if you press the acceleration you will hear it tap once then when you come off the accelerator you will hear it tap once again. So what’s about car makes noise when accelerating at low speed on the road?The rattling noise appears when you start speeding up from 0 to maybe 30 or 40 mph and then disappear after car speed surpasses 40 mph. When I say intermittent I mean that in traffic around town or on a highway if I accelerate a dozen times I hear it probably 3-4 times. REAR MAIN BEARING KNOCK: Makes dull knocking or thud noise. Hi, As you will see from the rest of the post, the noise was down to a loose wheel. To advertise, contact our sales department by calling (650) 948-9000 or email [email protected] A noise (clunking, squeaking, popping) can be heard when performing at least one of the following actions: • turning the steering wheel left or right • driving over speed bumps • driving on rough roads • accelerating or decelerating AND The noise is coming from the front stabilizer bar bushing. The noise is always worse when accelerating, though. I have a 2003 CR-V with 107k miles on it and have developed a vibration on what seem to be the near side (LEFT). But they are rather rare. Just had my transmission replaced by a friend and went to bmw because it had a clunk sound when slowing down mostly- the problem is the flange towards the rear of the car. Last weekend, I decided to go on a trip, about 1400kms of driving, and not too long into the trip, I noticed a quiet clunk like noise only sometimes when I accelerate, and the same case when I decelerate. When decelerating in gear (engine braking, essentially) there is a loud ticking sound that occurs in at least gears 1-3 (possibly 4th and 5th, but with wind and engine noise its tough to hear). Sounds to me it's the front bushings on the control arm. The car has approximately 85,000 miles. What could possibly be making the noise on acceleration and deceleration? Oil pressure is good. The noise is louder with the Windows open. I have a 2005 doing the same thing. Hello, I have a 2003 element that's had regular maintenance and just hit 60,000 miles. This noise is actually occurring. You will adapt by downshifting more than you have on other bikes. well, within the last month i had done an oil change on it and everything had been going good up until about a week ago. Does anyone have any suggstions and if this may be a common problem?. I have a 2010 tacoma 4 cyl manual transmission. clunking/knocking noise in 2015 hrv when lightly accelerating or when decelerating at about 1500 rpm. One hears the normal electronic whine but under that, the little birdies chirping. My daughter was thinking of purchasing this car. I have replaced the CV axles, u joints, plugs and wires, rebuilt the transmission, just rebuilt the transfer case because my chain was loose and changed the transmission filter, and put a new rear and on it. problem 1: a knocking/clunking type of noise on deceleration. I've got close to 110,000 miles on the. I have a 2014 Ford Flex Limited with 108,000 miles. Most likely the teeth in the flange are warn down and cause a sound when under stress. REAR MAIN BEARING KNOCK: Makes dull knocking or thud noise. change the intermediate jet like hydrohank said or try richen up the. I have an 08 Saturn Vue with the 2. When I press the accelerator, there is a rattling/knocking noise that fades once I'm at speed or if I accelerate hard. When hot and at low speed and turning right the noise comes back. 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. On accelerating over a certain speed, the noise disappears. 1) Bad Engine Mount (Idling, Accelerating, and Driving) Engine mounts are what connect the vehicle's engine to the frame of the car. A rod knock generally goes away under load and knocks loudest at idle. I am hearing a clunking/knocking noise when I accelerate and decelerate, especially in lower gears. I had rebuilt the motor of a 2000 PDS cart and after installing the rear end started acting up (Knocking when accelerating). IMO the noise is coming from the lower part of the engine compartment (tranny tunnel area?). It is only during deceleration and only right at the moment before the clutch completely disengages. I don't lose power if I had to accelerate, but because the cabin is so quite I can hear every little thing from the engine. BROWSE NOW >>> BOAT LOUD AND CLEAN MOTOR ENGINE IDLING ACCELERATING AND DECELERATING. Joined: Mar 27, 2009. I noticed a knocking/click sound from the left front tire side when quick accelerating then deceleration. During each acceleration and deceleration, turn the wheel SLIGHTLY from the 10:00 o’clock to 2:00 o’clock position. I have replaced the CV axles, u joints, plugs and wires, rebuilt the transmission, just rebuilt the transfer case because my chain was loose and changed the transmission filter, and put a new rear and on it. The old tires were cupped. Jan 01 2012, 7:06pm +1 And remember, the 4WD system isn't made to be used all the time, so a little noise is normal. I have an 08 Saturn Vue with the 2. Clicking/knocking Noise in the Right Hand Rear End Hi everyone :) Ive got a weird noise in the right hand rear end. 6 D engine Quashqai 2016 made a noise at low speeds on acceleration/ deceleration in 1st / 2nd gear similar the sound u get when a worn drive shaft ball joint knocks on full lock. I pull off to get the codes read again, same codes as before. What causes a knocking noise in your front wheel when coasting or decelerating? Answer. Accelerating or decelerating the noise is not there. Dealership came back and said transmission was bad. Each time the car is accelerated this noise occurs, whether it is from a stop of while coasting. I have a 2014 Ford Flex Limited with 108,000 miles. thanks xt, and everyone for their imput. common problem with punto's put some grease onit or spray some wd40 on the springs and if its the same problem it should work if not its worth a try anyway lol hope i might have helped lol. Of course, they couldn't duplicate the problem on our last visit, so I thought I'd check here to see if anyone else has experienced a growling/vibration/rattling noise upon acceleration after making a 90 degree turn. It seems to be getting worse in a matter of about 3 weeks and I ride it daily 50 miles. (maybe because of the thinness of the cover compared to other block or head. Let off the pedal, and the sound goes away. Just replaced front discs and pads on my Astra 1. Hello everyone, 2013 Volt here with clicking noises on acceleration and deceleration. 1st gear, accelerate, sharply drop off the gas - and invariably get a heavy sharp knock somewhere in the bottom, middle to rear. I have heard of many people putting less than 91 octane and then getting a knocking sound in the engine. i've noticed the sound around 35 mph, 45. I do think it could be spark knock/detonation. I believe it is also the culprit of the vibration in the car. Pull the plug wire individually and noise did not change at all. wanted to get some opinions before bringing to dealership. The sound occurs in 3rd, 4th and 5th gears while accelerating at a non-aggressive pace. i havent noticed any knocking at all when cornering like you would with a CV joint gone, although i did notice a slight vibration through the steering wheel when pulling off a few times today,nothing too bad, just the few knocks. i noticed that when i stepped on the accerlertor the engine, or what i believe to be the engine, starts making a rapidly moving ch-ch-ch-ch sound. Updated on January 26, 2019 I don't hear any sounds until I take it close to 50 mph and let off the gas pedal, in which case I will hear a knocking sound. The RPM fluctuates by about 100 up and down. Jan 01 2012, 7:06pm +1 And remember, the 4WD system isn't made to be used all the time, so a little noise is normal. Accelerating part throttle is perfect. acceleration and deceleration clunking chirping whistling sound (almost metallic watery) particularly under accelaration, though not present all the time b) vibration, not particularly bad, but noticeable c) sometimes kick back on accel/decelaration or d) all of the above. The noise is mostly due to drive train ringing (rapid acceleration and deceleration of the drive shafts on over run) due to the relatively low inertia of the main drive shaft and drive axles. Strange Knocking - Fixed! Shoot me! To test what was causing it I jacked the wheel that was making the noise off the ground, gave it a tug to check for loose bearings (not loose) then turned it over and it squeaked at the point where the clip rubbed against the rubber bush. They all do it to some degree. Acceleration & deceleration (coasting & braking) are adjustable separately for ech gear to ensure maximum realism. I have just under 800 miles on the car and have noticed the clicking for about 2 weeks now. Re: Knock sound on acceleration from stop Mon Oct 27, 2014 2:59 pm I also hear the soft "thunk" some of the time when coming to a stop, accelerating from a stop, or when the car's momentum shifts it from accelerating to decelerating (or vice versa). Firt time I took it to the dealer, they didn't find anything wrong. Does it knock in neutral? Does it knock in gear during deceleration. The strange thing is, it goes away under acceleration and deceleration. Deceleration knock is the same as detonation it's can accur under deceleration and acceleration. The problem has something to do with the excessive buildup of gasoline. If it's a deeper "knocking" sound, does the sound ONLY happen at idle and deceleration (but go away under load)? Test by placing it in D and holding the brake while lightly presing the throttle (or putting it in gear and lightly applying the e-brake while accelerating). · Noise in clutch area · Clutch pedal stays on floor · High pedal effort. Anywhere between about 25mph and 55mph there is a noticeable knock coming from the driveshaft/rearend every time I lift off the gas. I recently had work done to the van including front Wheel hub bearings,brakes,rotors,and transmission fluid change. I first thought. During initial Deceleration this same noise occurs. Decelerate and hear the noise, shift from drive to neutral and no change. Acceleration & deceleration (coasting & braking) are adjustable separately for ech gear to ensure maximum realism. Have a passenger ride with you to increase likeliness of determining which side the noise is emitting from. A noise that gets louder while you're vehicle is accelerating, probably means that there is heavy contact of the pinion-gear teeth on the outer ends of the ring-gear teeth (pinion gear not set. Here are a few common "noises" that may come from the rear axle that need immediate attention: • A "whirring" noise while decelerating at any or all speeds is most likely caused by bad pinion bearings or loose pinion bearing preload. especially when I step on the next gear pretty hard. It makes more noise on deceleration and very little on acceleration and sitting still less noise with more RPM. The knock is only once upon acceleration and/or deceleration. I have replaced the CV axles, u joints, plugs and wires, rebuilt the transmission, just rebuilt the transfer case because my chain was loose and changed the transmission filter, and put a new rear and on it. Re: Funky metal on metal sound when accelerating. Sometimes carbon will build up on the piston or valve, come loose and sit on the piston top. Hey guys, Ive got a tapping noise where you will hear one tap on acceleration, then one tap on deceleration. Checked it but there was no play, lugs were tight. I have a 1996 Evinrude 70 HP outboard, engine runs great, but I started hearing a knocking noise from the lower unit. Updated on January 25, 2019 I hear a knocking sound coming from the passenger side. I stopped the car thinking the wheel was about to come off. Hey guys, Ive got a tapping noise where you will hear one tap on acceleration, then one tap on deceleration. This can be detected by lifting the vehicle and examining the various mounting points that support the transmission and engine to hold them in place. Other AWD manufactures will use more massive drive shafts, rubber couplings and other devices to eliminate this issue. Loud noises to me sound like problems. Last time I got underneath I verified everything seems tight along the wheel (tie rods, wheel bearing, etc), and it only does it when I'm coasting (clutch in or out) or decelerating, the sound goes away during braking and accelerating. Sometimes when coasting, if I hit the accelerator, I hear a kind of "knock"noise. Also watch out for "gear hunting. Lately I have been experiencing a loud clunk noise at times of acceleration and also when I release the gas pedal. The sound will cease when I slow down, and I won't hear it until I go around 50 mph again. Clicking noise when accelerating. Rod knocks usually only happen when the engine is cruising. As soon as I push in the clutch under speed, I hear it, I also hear it as I accelerate while in gear. We have a 2005 honda civic hybrid; there is a squealing noise coming from front passenger side, when braking, when accelerating, decelerating, but not while driving at speeds of 30 mph, straight. The click sounds like it's coming from the engine or possibly under the dash, but deep towards the firewall. The noise is a hum or drone sound and comes from the front. These loosen up over time on these inline motors due to their reverse-flow design. Engine noise on deceleration? 19 Answers. I have this strange "knocking" sound when the Rav4 goes on an uneven road, pothole or hump. When I start accelerating again, it starts again. heyyy, mine makes a clunk when i have people sitting in the back of my car i belive its just the suspension. Further questions, Ideas: *Some exhaust parts can rust and make noise, I would call them rattles, but can you check that out to rule it out? *You said you can hear this on deceleration which kind of rules out spark knock, or detonation. '01 Jetta has a muted "clunk" coming from somewhere under the hood when first accelerating or initially decelerating. Last weekend, I decided to go on a trip, about 1400kms of driving, and not too long into the trip, I noticed a quiet clunk like noise only sometimes when I accelerate, and the same case when I decelerate. He mentioned to us that the dealer it was serviced at said the clutch was "soft. I took it to another dealership and asked the mechanic to drive the vehicle and I will point. It makes more noise on deceleration and very little on acceleration and sitting still less noise with more RPM. For your Quick check Vid, I'd say Broken Piston, as the Knock appears to be on acceleration side of the Load. It also allows to control the brake lights, the brake sound, the reversing light & the reversing beep sound properly. This is the second engine from them and i am now really concerned that i either have really bad luck or that i have another motor that has failed. I did this quite a few times to try to find the source of the clunk and my engine did stall once, but I believe that to be the rapid acceleration then deceleration. So locate a flat level road that extends for several miles. I believe it might be something loose in the passenger door or dash area (behind the. When ever im at 35mph or above and let off the gas and start decelerating i have a loud whining noise as if i had 44" swampers with massive knobs minus the vibration. You might think that an issue in deceleration is not one of the signs of a bad fuel pressure regulator. 6L 3V V8 engine and the TR3650 manual transmission built before 02/21/2005 may exhibit an intermittent raspy grinding noise while driving in 2nd and/or 3rd gear during acceleration. It is very consistant with the speed, meaning that if you stay at a particular speed, the noise doesn't change at all until you change speed. In some transmissions a worn-out bearing or gear can cause a whining, humming or whirring noise that can be noticeable on acceleration or deceleration. Hey, noob here, just got 04 getta gli 18. It's a little difficult to describe but here are couple of videos about the problem: search on youtube: weird knocking sound when accelerating part 1. This noise is only when moving and gets louder and changes pitch, the faster the car is going. If the noise is a steady metallic rap, it may indicate a rod/rod bearing. The wife never used the 4WD because she thinks only a sissy uses that where we live (she is from Maine). Pull the plug wire individually and noise did not change at all. I stopped the car thinking the wheel was about to come off. 1997 Toyota Camry makes a knocking noise. I need some help trying ti understand the causes of a knocking noise coming from the engine when I'm decelerating and accelerating in low rotation like 1000 rpm. it is like a sort of grinding/winding noise. Any ideas?. If anyone is having the same. If all is OK there, lift the. I'm having a loud/hard knocking sound that sounds like it's coming from the top of the engine. 2015 WRX Acceleration and Deceleration Noise Does anyone else have this noise/rattle under WOT and when decelerating in 2nd and 3rd gear? The noise seems to go away once the clutch is pushed in. Pulled into parking lot and opened hood. Hey guys, Ive got a tapping noise where you will hear one tap on acceleration, then one tap on deceleration. front end knocking noise on deceleration. What could this be?. Pressure generated by the turbocharger has nowhere to go, thus causing it to "stall" or "surge". Problem with sounds is one guys “knock” might be another guys “tap”. Low quality fuel. It also only does it when I rev the engine up. That is how you’re able to accelerate as soon as you step on the gas pedal again. Nothing on acceleration, only decel? Check your oil, look for metal in it, you'll have to drain it. Inboard joint: A worn or faulty inboard joint makes its most noise while accelerating and decelerating. Followers 0. The Town Crier publishes six different glossy magazines throughout the year. 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 forward. Sounds like its coming from drivers side. Any time I took my foot of the gas this would happen. Alternatively, if the rear transmission is bad in a rear-wheel-drive vehicle, the noise will occur when letting out the clutch in reverse as the tail shaft of the transmission rises up and slams back down. 2007 Forester XT 5MT with noise under floor when decelerating only. Rod knocks usually only happen when the engine is cruising. I have a 06 navigator that had the same knocking sound and took it inI was told by a dealership that everything is normal and they couldn't hear the knocking sound (Perhaps they didn't want to hear it), but I don't buy stock into someone telling me nothing is wrong when I can clearly hear a knocking sound from an engine. The sound will cease when I slow down, and I won't hear it until I go around 50 mph again. Let off the pedal, and the sound goes away. You will adapt by downshifting more than you have on other bikes. My wife's 08 Odyssey has been making a popping sound when slow speed turning for a little while (very slow) doesn't seem to happen above 10. It is making a knocking or clunking noise when accelerating or decelerating if I push the clutch it stops. I stopped the car thinking the wheel was about to come off. If you hear a light knocking or pounding sound, the noise can usually be traced back to your connecting rods. Lately I have been experiencing a loud clunk noise at times of acceleration and also when I release the gas pedal. Has had no problems whatsoever, currently at 18k miles. A knocking noise can occur from worn engine mounts. The noise only happens at idle speed, as soon as you touch the accelerator it goes. Only really audible from the inner cabin, even with the windows open. Yesterday I noticed a knocking noise on acceleration and deceleration. I have a intermittent sound coming from under the Tundra that is getting more frequent and louder. · Noise in clutch area · Clutch pedal stays on floor · High pedal effort. I had a tow-bar fitted & mentioned the noise to the fitter. i've noticed the sound around 35 mph, 45. It is quiet when first started or in gear at idle. There are two types of ducts; accelerating and decelerating. Took into the dealership for service because of rough idling, loss of acceleration and a whining noise when accelerating. But whistley and coming from the front of car/engine bay. I have also helped replace my friends motor mounts before so that should be an easy install if that in fact is the culprit. Toyota Supra Forums! Join the Supra forum! > Performance, Modification, and Maintenance Forums - for generation specific discussions > MKIII Supra Rear end knocking under Acceleration and upon Deceleration. After doing some research online, some believe it can lead to clunking when decelerating or accelerating. The other noise you might be accustomed to is that of a loud exhaust system.