Silverado Humming Noise When Accelerating - Grinding Noise When Accelerating: Causes, Diagnosis, And Fixes.

The pandemic has sent many of us home to work amongst the noise of our neighborhoods, pets, and loved ones. needed for grinding noises on acceleration can be DIY, but others, like transmission issues, should be handled by a professional. 06-26-15 02:22 PM - Post# 2557704 I have had my truck for 9 months and I have noticed a strange noise when accelerating. I had both front rotors replaced less than 10,00 miles ago and this does not sound like rotors. Spark Plugs: Worn or damaged spark plugs can cause noise when …. As a result of the misaligned wheel, you will also have a rougher ride. At 1200 rpms there is noticeable noise in the dash. This noise is currently under investigation by Mazda in my car, but it is a common complaint on these forums. Although some Samsung TVs naturally emit a soft hum resulting from the electrical charge used to create the screen images, excessive or loud humming may indicate a problem. Just got my 15k service done 4 days ago. It eventually got to where the sound would be constant, so we took it in to the dealer who said it was a sheared bolt on the exhaust manifold. The other thing that gets me temperamental is the Damb passenger seat belt when not flip correctly between the …. the sound changes as vehicle speed increases eventually reaching a point where it cant be heard. But if you're struggling to track down the location of the noise, we have a few tips for you. If you hear a sound you’ve never heard your car make before, take it to your local shop immediately. dog doubt face To finish, if you experience a noise when accelerating with your Infiniti Q50 and this noise which could be a cliking sound tends to stop when you disengage (press the clutch pedal), then one of the wear parts of your clutch system may be the cause. Potential causes of turbo noise include: • Boost/air/vacuum leak – either on your engine intake, or your intercooler. One possibility is that the engine’s oil level is low. Aug 26, 2023 · Conclusion: Several factors, including worn-out tires, a damaged fuel pump, or transmission overheating can cause humming noise when you take your foot off the accelerator pedal. An indicator would be leaking seals on the out-put shafts of the dif and side to side play. Once you have narrowed down which belt driven parts makes the noise, then spin the pulleys with your hand to see if …. It’s already the unofficial “end” of summer – Labor Day weekend. If you measure the rotational resistance, you could tighten it up by 3-5 inch pounds, it might help. Low or dirty transmission fluid can cause problems, including a whining noise when accelerating. Disconnecting the Electrical Connector. Note that the ANC works even when the sound system is turned off. 3 Liter Gas 1998 K1500 Silverado Z-71 5. Pitch is following engine speed somehow. And finally, the humming noise you will hear when accelerating can be due to design flaws in the tires. There are various possible reasons why a car makes a humming or whirring noise as these sounds could be a sign of a bad bearing in the steering system, water pump or alternator. It should move in and out with minimum play, but it should not feel excessively loose or frozen stuck. I have a 2005 silverado that is making a humming or groaning noise when i slow down no noise when it is idling or at normal or highway speed. has new wheel bearing on left side, right side is still good, new tires, bone stock. If not taken care of in good time, you may find. Indeed, the clutch release bearings must be replaced around every 120 000 / …. Grinding noise chevy silverado + what caused it -noise at 5:14Grinding noise when accelerating chevy silverado 2012 silverado 1500 4x4 turning noise. Shop for New Auto Parts at 1AAuto. 6 A Defect in the Car’s Mechanical Joints; 2 How To Fix a Car That Makes a Humming Noise at. Intermittently, I hear a clunking noise when I accelerate sharply from a full stop, example - foot on brake at a stop light, green light, hit the gas and there is a quick clunk. These are some of the most prevalent sources of rattling or vibration during acceleration: Loose heat shields. Once i drive for a while it doesn’t do it anymore. Post: Whirring noise on acceleration (Topic#285934) Windmill Member Posts: 20 Loc: Lubbcok,Texas USA Reg: 04-01-02. I almost feel like there's a loss of power but that could be in my head. The humming noise during acceleration can be attributed to issues with tires, brakes, bearings, or transmission. Just recently purchased a 2024 Silverado 2500 HD with 6. Remember that each speed level …. I heard a noise like that in my chevy 3500 box truck, the pinion bearing let go and the pinion gear was trying to climb the ring gearresult carnage. When I give it throttle above 45mph and it down shifts and puts the RPMs at 2,000, the shudder/stutter starts until 2,500 RPMs and then goes away. Humming and buzzing sounds in receivers can range from an occasional nuisance to a loud noise that can damage your speakers. It completely stops when I let off the gas & just coast. No noticable vibrations while driving. It seems to happen when cruising and slowing down mostly, it definitely sounds rotational. Again a different noise than the metal dragging noise. TEST: In a safe place, try your tight turn and also try to do that during a "terrain change" such as. A whining sound when accelerating is almost always caused by a bad accessory attached to your Tahoe's engine. There are several threads discussing it. I just picked up a new-to-me 2020 5. Brake shoe depreciation or clogged by any particles. To check the fluid level, simply open the hood and locate the power steering reservoir. Diagnose and Fix That Transfer Case Grinding Noise. Engine knocking refers to the metallic sound an engine can produce when pressure is applied to the gas pedal. The whistle sounds like a tea kettle. I tried the M5 trick and the RPM never seem to fall to the 1100 range while cruising along so no noise in V8 M5 mode but that might be a coincidence. Some owners report that this noise happens after switching to 4WD from FWD. I've always been a fan of quiet. You can fix them yourself or with the help of a mechanic. An engine can ping (or knock) due to an improper combustion process. Here are 16 possible reasons that might cause your car to make a humming noise: 1. just busted jasper ga Here are the most common causes of whining noises when accelerating: This humming sound will change with the engine's RPM. Truck looks great, however, I noticed there is a clunking noise everytime I start to accelerate from a stop. If your Nissan Almera makes a loud noise when you accelerate, it is quite plausible that the alternator belt is the induce of your problem. So I've noticed that it seems that its only around 1500rpm's. People talk about differential noise on acceleration because it's the most common area where noise occurs from on acceleration. Once I go above or below 28mph it stops. It makes the noise constantly when in 4HI, it makes the noise sometimes when in AUTO, but it doesn't make the noise at all when in 2HI. I was a convert to the Apple AirPods. When starting the truck you don't hear it until it idles down. In 2nd gear the noise begin softly at approx 2500 rpm and becomes louder with increase of rpm. I replaced the Struts, upper and lower balljoints, upper control arms, inner and outer tie rods, the pitman arm - and the arm. Car tires that do not have steady wear will definitely make humming noise when accelerating, even as wheel bearing problems. In addition, a loosened steering belt that becomes slack over time can also cause this humming noise when accelerating. Also when cold it keeps the vanes more closed in an effort to warm up the engine by making it work harder. This typically happens when the driver tries to switch between 2WD and 4WD. The most common sources of manual transmission noises include: Low fluid level. Doesn't matter if I'm accelerating, braking, cruising, turning or driving straight. round peach pill with 20 on one side It doesn't always do it and once I'm at highway speeds it stops. best christmas dresses on amazon Finally, if you encounter a noise when accelerating with your Dodge Journey and this noise which could be a cliking sound tends to reduce when you disengage (press the clutch pedal), then one of the wear parts of your clutch system may be the reason. Finally, there is an option except to replace the tires if the humming noise is produced because of the tire design issue. When this occurs it’s best to check the condition of your differential and replace if it’s in a rough condition. May 16, 2017 · thought I would put this out there to see if anyone has experienced thisMy sons 2000 silverado 5. You may have observed a clunking noise coming from your Chevy Silverado when accelerating or slowing down your chevy; this can also be experienced when crossing a bump. The noise was only audible above 25MPH, got louder with increased speed to 35MPH, then got quieter. Generally, if the rear wheels are not aligned, you will feel the vibrations throughout your truck's body. It starts from about 20 mph from what I. cigroller April 11, 2011, 12:17pm 2. Worn muffler: A damaged or worn-out muffler can produce a rumbling or growling noise. they still move but i guess you would say spun around. A defective wheel bearing can be the cause of humming noise in your Chevy Silverado 2500 HD. Another cause of a tire’s humming noise is a misalignment of the wheels. You can literally hear the humming mostly go away and …. Transmission fluid is one of the few things that is so easy to fix and can potentially fix the humming noise when accelerating. How to Diagnose Wheel Bearing or CV Joint Vibration Humming Noise we isolate the noise coming from the front end of this ram 1500 which was giving a vibratio. Very often, it is a check valve that goes bad, and can easily be replaced. fatal car accident raleigh nc yesterday Differential whine, also known as gear whine, is the high-pitched noise emanating from your vehicle's rear end, particularly when you're in motion. In some cases, the sound is louder, such …. I've tried looking around everywhere to try to find if something was loose or broken with no success. Reason Why Chevy Silverado Make a Clunking Noise when Accelerating? To understand why Chevy Silverado makes clunking noise, you need to understand how ignition works. Another cause would be a problem with the axles. Failing CV joints might also result in a spatter of oil on the inside of a wheel. Just bought a brand new 2020 a couple weeks ago with the V6 4x4 and I am getting a faint high pitch noise when accelerating. Inspect the drive belt for damage or wear. At first I thought it was the belt …. If it sounds the same, it's an issue closer to the center where that bearing is. With the loudness I could tell it was from the rear differential area. I've already replaced the drive belt, tensioner, Thermostat. The air and coolant constant circulation through a car’s engine is hot enough to rupture hoses and vacuum seals. In this case, you won’t hear a humming noise, but rather a louder engine revving noise. It almost sounds like grinding gears in a manual. Chances are somewhere in the line, you have an open valve letting all the vacuum go strait to the TC. Whether your building is under construction, the dog barks incessantly,. The whining noise is also known as engine vibration. It started abruptly after accelerating on an uphill on ramp to the interstate when there was a low pop and what sounded like metal bouncing around internally. Bad automatic transmissions may emit humming, buzzing, or whining noises while manual transmissions have harsher “clunking” sounds. Still blows cold air and performs like it should but makes the horrible whine. Make sure to spray into the cat from both sides. The grinding may also be caused by damaged or worn synchronizer blocking rings, shift forks, or bearings. Either way, make sure you take the car to your mechanic to avoid further issues. The new shift rod fixed both issues. If none of this helps, have a certified technician look into the driveline noise to isolate the exact cause. During acceleration there is a humming/whining noise then a rattling noise comes as well. A punctured hose often results in the car making a whistling noise. HUM: Get the latest Humana stock price and detailed information including HUM news, historical charts and realtime prices. 3 – Escaping Exhaust Gasses Due to Leaks in Exhaust System; 1. Any Suggestions? -2000 GMC Sierra Z-71. It isn't the fan noise or the buzzing sound from the EGR line. If the fluid level is low, it can cause the pump to work harder and make noise. 3 Troubleshooting And Solutions. my ? is would it make popping noise when accelerating from a stop or could it be something else i know pitman arm needs to be replace could it be something else iam aslo going to replace my …. Not sure how many belts you have, but my 99 5. It reminds most people that hear it of a harmonic sound and gets louder with rpm change. This movement can cause the engine to hit other parts of the car, resulting in a clunking noise. Truck has appr 450 miles on it. I actually think it sounds like a resonance from the exhaust vibrating another piece of metal. Here are some components that can the rattling noise: A loose or broken pipe connection. Worn-out tires can contribute to a car sounding like an airplane during idling and acceleration due to their altered tread patterns and reduced ability to dampen road noise. Once the crankcase is out, check if there are metal shavings. Here’s the sound of a cupped tire: If your Chevy Silverado is suffering from uneven tire wear, you should be able to pick up the noise while driving around 30 MPH with it getting louder as you accelerate. Incorrect tire pressure, misaligned wheels, and suspension are the causes of irregular tire wear. Jan 1, 2012 · I have a question I was was hoping someone could help me with. Page 4 December, 2021 Bulletin No. My '4wd' fluids are all good as of this spring - 80w90 in the front diff. If your Land Rover Discovery Sport generates a loud noise when you accelerate, it is quite plausible that the alternator belt is the reason of your problem. The power steering pump is a common reason your Chevy Silverado might whine when accelerating. Jul 31, 2023 · THE 4 MAIN REASONS WHY CAR MAKES HUMMING NOISE WHEN ACCELERATING. Usually the humming gets louder under acceleration. About a month ago we started to notice this high-pitched whine sound when accelerating. Frequent brake noise at low speed (caused by damage to the outer CV joints) makes grinding noises when making a tight turn at a low rate. serial turkey dooble farsi upvotes 2020 GC TrailHawk V6 68-76MPH exhaust drone/vibration/humming. The power steering pump is a common reason your Cadillac Escalade might whine when accelerating. When I get up to about 70 mph and let off the gas to coast, the truck will make a noise that sounds like rumble strips. weird part is, is that it goes away when the highway turns to the left or if I am changing lanes to the left. The power steering pump is a common reason your Hummer H3 might whine when accelerating. This noise can be likened to a continuous, somewhat eerie whirring or humming sound. had a whining noise to begin with then wouldnt ingage any gear, unless …. If you’re hearing a loud grinding sort of noise coming from your engine compartment, it’s likely caused by the alternator. Some of the most common culprits include worn or damaged spark plugs, a failing exhaust system, or a worn-out clutch. The vibration will be felt at the floor board and can be either a small vibration or a large one depending on the wear. 3 Humming Sound From Worn Wheel Bearings; 1. Ticking sound under my 09 Silverado 5. accidental dance destiny 2 Clunks, groans and squeaks that only occur during acceleration, deceleration, sudden speed changes or when encountering bumps usually point to loose, worn or deteriorated suspension components. Sometimes other symptoms may also appear, a …. When this occurs it's best to check the condition of your differential and replace if it's in a rough condition. When a Ford F150 makes noise when accelerating, it could be caused by a few different things. The rattle sounds like a pulsating vibrating thin plate. If you still don’t hear a loud car. I never thought I’d need a pair of serious noise-canceling headphones. With the window down under acceleration it sounded like an air hose blowing 200psi through it not good. I just took my chevy silverado 2500 on a road trip and on the way here there is a constant humming noise coming from it sounds like my front passenger side wheel or suspension. From a stop under moderate acceleration, listen for any growling, howling, whining or whirring noise. gas needle is pointing south and rpm usally stays around 4000 5000, oil is …. Silverado intermittent vibration. The radio is now changing sources on its own and its. Sometimes, the power steering pump may also be an issue, especially if you hear a whining sound as …. They develop over time as the result of poor maintenance, abuse, or high mileage. The other whine is dependent on engine revs, and is most noticeable at a steady 100kph (62mph). Keeping a constant speed it will be pretty quiet but as soon as you step. Raise the vehicle with a jack and jack stands and feel the wheel for excessive play or stiffness. If the pressure is too high, the variations that occur when opening and closing a valve result in b. There are tons of background sound sites and apps, but most do the same things. If your Chevy Silverado’s alternator is going bad, it’ll often begin to put out a high-pitched whining sound. okay so, I have a chevy silverado 2010 1500. Unhook and plug the vacuum line going into the 3 way connector right behind the battery. Sounds like a heat sheild, but they all seem ok. If this situation occurs for a long time, it will lead to engine failure and replacement costs. The transmission filter is located inside the crankcase. Description of this sound: This noise is associated as a vibration or buzzing sound; similar in many ways to the sound …. When accelerating, the Jeep Wrangler can produce noise. humming noise when turning left only. Possible Reasons for New Tires Making Humming Noise. The noise is most distinguished at low speeds like 15-30 mph. Clicking Noise in Chevy Silverado 2003 1500 4x4 (clicks start at 1:30. 3K members Since 2009 A forum community dedicated to Chevrolet Silverado and GMC …. Listen closely and figure out the kind of sound it is making. Drain the transmission fluid with a sizable wrench. The only way I can describe it is it sounds like a supercharger. No change in the noise when changing the hub …. Bad wheel bearing can be one of the main causes of humming noise in your vehicle. I have a 2008 Tahoe 2wd z71 with the 5. I noticed last night when I slowly accelerate or slow down around 10-20mph, I’m hearing a buzzing or vibration side on the right passenger side. Keeping a constant speed it will be pretty quiet but as soon as you step on or let off it whines. It happens in every gear and only occurs when accellerating no matter what gear i am in it occurs at the same rpm. This noise also occurs when changing between songs on an Ipod that is connected via USB (but only like every other few song switches). Open the cap at idle, you'll hear the difference in noise. If You are hearing humming coming from the 2014 Chevy Silverado then it can be a couple of things. I ended up just blowing it off and chalking it up to general road noise. They are so faint that it is hard to tell where the chirps are. Have you ever hit a bump in the road and gone flying up in the air? Learn how vertical acceleration works in this article. And the humming or grinding noise is the main indication of such a problem in the cabin from the direction of …. Hey guys, So I just purchased my 2014 charger R/T and I've had it for about a month. 3L, 6L80e, 4X4, HD Towing pkg If you can't fix it with a hammer, it is an. The hum sounds exactly like if you were in a sedan going over a bridge. The truck starts and idles without an issue. My gas mileage has also dropped about 2. High Pitch Noise When Accelerating. With uneven tire wear, you may also notice: Steering wheel vibration. While it’s likely that any debris caught inside that you removed was causing the bad blower motor sound, you’ll want to test your blower motor to make sure. It's pretty loud especially around 35-40 MPH, then the pitch gets to a point where you can't hear it. Feels like it's coming from the front passengers side, only occurs while driving starts around 30-40mph have not been able to test going over that, slows down/stops when I begin to brake. Take a close look at the photograph. I noticed a strange humming noise on the way home from buying it while coasting around 40mph. Inside a Particle Accelerator - Inside a particle accelerator you can find the computer electronic systems and the monitoring systems. It does seem like it is more prevalent in V4 than V8, however it may be the increased road and engine noise in V8 that it is not noticeable. It runs the pump for a few seconds when the rail pressure isn't where it should be for cranking. The sound is audible over 20mph and definitely at highway speeds and when decelerating. In any case, this is not a serious problem, and it may easily be fixed by just tightening the engine screws. I have a 1999 chevy silverado 1500 4. drakeo the ruler gif The noise may be a hollow knocking sound or more of a rattling sound. This uses a pair of microphones placed in the cabin to pick up low-frequency …. 1 Damaged or Unsuitable Tires; 1. Check the transmission for wear or damage. So, it would seem the turning driveshaft is not making the noise as it turns in both 2 and 4 wheel drive. Low transmission fluid is a common issue; it reduces the hydraulic power needed to shift gears smoothly. My 2012 Silverado regular cab 4. Hey guys, I have a 2010, and when the radio and HVAC system are completely off, I can hear a hum right behind the radio. Doesn't make it when I put the car in brake and rev the …. Clunking noise during acceleration in a Chevy Silverado may be caused by drivetrain or suspension issues. It's a nuisance that shows up as hum and hiss in audio, stat. I've read around about a heater hose being zip tied, but I don't see how that can. Letting the foot of the gas does not …. I have also for the last month been having my low coolant light come on. It sounds like crickets chirping or a vacuum leak. Suspension grinding, and brake screeching. Front end whine in 4wd and 4auto. Not sure if it’s the transmission doing a …. At first I thought it was the belt but after a closer look it sounds like its coming from underneath the engine, almost by the transmission. I hear the noise while driving and when turning to the right. In fact, the clutch release bearings must be changed approximately every 120 …. Step 1: Rev the engine while the car is stationary or parked by pressing the accelerator pedal. I have almost the exact same problem with my 99 Denali, but it only makes the noise when 4wd is engaged. If the whining noise while accelerating is loudest while taking a turn, the problem may lie in the power steering assembly. visual inspection and can't see anything rubbing. Noise: Driveline squeaking or grinding at any speed. Every single time without fail it happens at 28mph. If you encounter a vehicle with the above concerns, complete the procedure outlined below. The reason that the bearing noise goes away on right turns (or curves) is during that maneuver the weight of the vehicle shifts from the right to the left and that "unloading" of the right side wheel position takes some of the. Indeed, the clutch release bearings must be replaced approximately every 120 000 / 130 …. Howling under acceleration at various speeds, however, indicates that the gears are already worn out or are out of alignment or depth with each other. Dec 23, 2020 · Brake Calipers. Moreover, you can blame most of these problems on little or no mai. You’ll hear the grinding get louder as you rev the engine. if it goes away when 4x4 is engaged then I would lean twoards the hub. The noise only happens when I accerate, if I let go of the gas and let it coast, the noise is gone. Trying to find out where and what noise is coming from the front end area of my 2005 Chevy Silverado. Dealer says 125 trucks have been registered with GM with the same noise. Jan 31, 2021 · Just bought an 01 1500 4x4 5. I only notice it the first time I open the drivers door. The main reason for the whining might be a loose belt, that runs over the power steering pump’s pulley. There is no shaking like rumble strips, but the noise is more of a loud hum. Love the truck but one thing has been annoying the heck out of me. OLD: 2010 Sierra All Terrain, 5. If your motor mounts are worn, they may not be able to properly support your engine, causing it to move around more than it should. Did some research and seen a common thing is the manifold gasket, trying to see what. About a week my 2013 Chevy Silverado started making a noise from the lower part of the engine. When the stereo is on there is a buzzing noise in the speakers when the motor isn't running and when the motor is running there is also the alterator wine coming from the speakers. When an exhaust leak is present, this also cuts short the muffling of noise, which makes the …. It sounds like a loud humming sound or a vibration. 0i has had a few issues lately, first the leaking valve cover gasket, which I had fixed by the dealership. Check it and swap it if it is the cause, otherwise you risk clogging your engine in the long run. 3 high pitch whine when accelerating - Chevy Message Forum - Restoration and Repair Help. For example, when you turn left, the weight comes off the left side and is redistributed to the right side. One last thing to consider is the humming noise potentially caused due to mechanical issues. The noise a damaged outer CV joint makes is a clicking noise with a metallic tone: sometimes faint, sometimes very noticeable, but constant while turning or accelerating. Tires are new, front brakes are new, u-joints on front and rear driveshaft are new as well. To clean the catalytic converter with sodium hydroxide, you'll first need to remove it from the vehicle. 3, 2wd, short bed, single cab silverado with around 126000 miles on it. Jun 21, 2022 · Do you hear a weird whining noise from your 2021 Chevy Silverado? Watch this video to find out what it sounds like and what might be causing it. 3L very recently developed a new issue. GM is adding an electric Chevrolet Silverado pickup truck to its lineup, as the automaker pushes to deliver more than 1 million electric vehicles globally by 2025. I tested again with the vehicle in four-wheel-drive. Another possible cause of this problem is a misaligned drive belt. 3 high pitch whine when accelerating (Topic#325999) regbob Newbie Posts: 41 Age: 56 Loc: Minneapolis MN Reg: 04-02-11. Loosening the nut is a sure fire way to destroy the axle, you would be taking tension off …. In fact, I generally need it to be pretty quiet to get things done,. Loud humming noise when accelerating, 2008 chevy uplander recent oil change walmart, no, burning smell can't describe it - Answered by a verified Chevy Mechanic. It is it's loudest when not accelerating and coasting in the 15-20mph range, but exactly at 15mph the noises goes from loud to non existent. If you only hear noise when accelerating or decelerating, you may have bad ring and pinion gears. I thought I was coming from the clutch fan because it doesn't occur when I. Easy enough to do them in the driveway. When I accelerate there is a load humming noise coming from the engine. Im not sure what it could be the engine has 91,000 miles on it is a 4. Thrashing back and forth at tremendous speeds, the two prongs of the fork, known. Cupping is when the tires wear unevenly, meaning that some of the rubber is higher off the ground than other. Again a different noise than the metal dragging …. If the noise is proportional to road speed (increases with road speed), or gets louder when you are on a freeway on/off-ramp, it's likely a wheel bearing. It is present from around 1000rpms to 2700 rpms. Checking this issue is easy, you just have to shift gear to neutral while driving, if the humming noise disappears, then the input shaft bearing. One of the most common reasons is the car is low on oil. During the trip: The noise got worse - started about 25 mph and continued to over 50mph and was much louder - and much louder outside than inside. The outside wheel in a turn has a higher load. This mainly occurs due to the tires being unevenly worn out. The truck makes a whine noise when accelerating but is loudest in low …. In your case, that is when the noise goes away. There’s a lot to be optimistic about in the Healthcare sector as 3 analysts just weighed in on Eli Lilly & Co (LLY – Research Report) There’s a lot to be optimistic a. apply at amazon warehouse Also, a loose engine mount can cause such noises when accelerating at low speeds. However, suppose you are already experiencing a humming. 24 hour mcdonald's near me open now Rough idle or interrupted acceleration are signs of cylinder misfire, often accompanied by the Malfunction Indicator Lamp (MIL). As it ages, the pulley can develop wear marks and scuffs on the surface. Then as you let off the throttle, once the rpm's come back down and hit the 1500rpm mark the noise happens slightly, then goes away. Indeed, the clutch release bearings must be changed around every 120 000 …. Ha ha I'm get that noise in the morning at around 15-20mph then it goes away never cared about it sounds like something rubbing a wire or something from the center counsel. Idle is stable, wide open throttle is stable, all other regimes does not seem to exibit any issues.