When my AC turns on or changes speed - a humming sound occurs. It only lasts for about 1 - 2 seconds.
Is this normal
It sounds similar (higher pitched, but not as loud) to the humming you hear when you turn the vehicle off.
I've noticed about the last 4 weeks my 2008 touring Prius (85k miles) seems be running louder than it always used to. There is a sort of humming noise that follows the speed of the car, whether the engine is running or not, in neutral or drive. No warning indicators on the dash. No change in mileage observed. Seems slower to accelerate too, though I'm not entirely sure. I'll probably bring it in to get checked.
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2004 Honda Accord LX
Engine: 2.4 L
119,400-ish miles
See above video link.
I've been having this odd sound occur while I accelerate - sort of like a grinding sound (about 7 seconds into the video). It might be a bit difficult to hear over the other sound coming from my car... It occurs a lot more frequently when it's cold, when I'm accelerating, and when I am turning while I accelerate.
Also, the more obvious noise that occurs throughout the entirety of the video just began today. It does not occur while I'm stopped and it began when I stepped on the brake a little harder than usual...
My 2008 Prius had a front quarter panel replaced after my wife back in to a fire hydrant.The body work looks fine , no issue there, but now when the car is coasting with the gas engine off you can hear a humming sound that was not there before the repair.Also it does,nt seem to be recharging the hybrid battery at the same rate.My thought is maybe the body shop caused some damage to MG1 by spinning the front tires on a emision testing machine or rollers.Does special precautions would have to be used when testing wheel clearances after a quarter panel replacement on a hybrid? Would a body shop need to do this ?
View 2 RepliesMy DSG Autobahn 4 dr with 4800 miles has developed a humming and vibration at highway speeds and my dealer and I are stumped as to what it is. I don't really hear the humming until 60mph+ but then its a 1 second pulsing hum coming from the front of the car and I can feel some vibration through the pedals and floor board.
The dealer has checked all wheel bearings and actually replaced the passenger side front bearing. They have also rotated all the tires and one rim that was slightly bent was swapped with another wheel but this did nothing to eliminate the sound. I'm waiting for my dealer to get back to me of when a VW engineer would be available to have go at it.
My wife's 2006 Prius is having some problems. The car has 187,000 miles on it. When the engine starts it makes a continuous whirling or humming sound. WHen I try to drive it has minimal power and can not be driven above 15-20 mph on my street. I bought an inexpensive Actron code reader and got the following codes. P0A92 P0300 P0303 P0304 P3191. Does it sound like a definite transmission problem and those other codes are caused by the transmission problem.
View 13 RepliesI purchased my .:R last summer with just over 100k miles on it. Two prior owners, car was fully stock and in great condition except for one thing:
Humming/vibration ("brrrrr" sound) coming from the back of the car when turning at a slow speed with the wheel fully cranked, e.g. moving out of a parking spot. It only occurs when moving, and with the wheel fully or almost fully turned in one direction.
The guy I purchased it from brought it to a local VW dealership when he noticed this and they (obviously) did not find anything wrong with the car, and blamed it on the tire wear.
So I changed all four tires. Still made the noise.
Haldex oil had been changed by the original owner but not by the second owner (who owned the car for two years prior to my purchase). So I had the Haldex oil changed and my mechanic said it was dirty AND at a low level, and might be the source of this problem. The noise did diminish for a bit, but it is still present.
So, I'm afraid my transmission or differential are fried from running on too little oil. It does not affect anything but it is definitely worrying me.
I have a 2007 Prius with 136,500 miles on it. Love this car. Getting 53.3mpg currently. A while ago I started noticing a strange sound coming from the passenger side of the car where the engine is. Recently the sound has become more pronounced and it has me stumped. The noise occurs upon acceleration, but not all of the time. If the battery is at 2 purple bars and I accelerate, the noise is very noticeable. But once I get to cruise speed it goes away. Again, this is sometimes and not all the time. Hopefully it's nothing, but I figured I would post this incase something is on the verge of failing so I may catch it in time.
View 7 RepliesI'm experiencing a grinding sound that seems to be coming from the rear of the car. I can't tell if it's the tires wearing or it's something else, it's especially prevalent at certain speeds and on a curve..........
I can hear it when going slow and proportionality the grinding is slow... as speed up it's faster and at certain speeds it's quite loud...........it there something besides the rear tires that could be causing that, rear axle? something needs to be lubed?
At first i was sure it was the tires which are turanaza's and they have gotten louder (I think) as the mile have accumulated, but now I'm not sure since i can hear it at low speeds on turns.
Some of you might remember I've pondered here before about the strange pulsing that occurs on my steering (on the V10) when maneuvering at low speed. It's always done it. Well, for the 18 months and 15k miles I've had the car.
Nobody (including Phaeton technicians) who have heard it/felt it have had any useful advice or insight (save offering to take the engine out to check on various bits).
I had always assumed that it was something like the load when the car is being parked etc was sufficient such that some relief valve was lifting momentarily and repeatedly. However I've come to realize that it is not just the slow vehicle speed, but engine speed too. Of course, nearly all parking maneuvering is done at tick over. But if I raise the revs just a little, the phenomenon seems to go away. Not easy to isolate maneuvering speed from engine speed... which is why I'd not really noticed before.
I have an 04 Pontiac (wifes car) as you start driving you hear a humming noise that starts at about 20mph and gets louder with speed at high speeds it just stay's steady, changes when changing lanes and gets quieter as you slow down, I know its not the engine or transmission as I can rev the engine and only when the car speeds up the sound changes (louder). I've been seeing similar post and its either CV joint or bad bearings but need more of a defined answer from a mechanic who recognizes this situation. Also the sound does make a little vibration felt through the steering wheel and gas pedal but again changes when steering is turned back and forth which I think means it's somewhere in the drive shaft and axle area or steering system.
View 1 Replies2013 SF Limited AWD = long base, 41K miles
Slow speed sharp turns left and right taking off from a stop I hear a thumping/light popping in the driveline. Seems like it could be a differential issue?
I also hear an unusual noise while accelerating in a straight line.....under throttle from a stop, it sounds like a rapid chirp on and off, every other second. Almost like a valve tick. The noise is heard under acceleration in gear, not when cruising at light throttle. I put the transmission in neutral while rolling, revved up the engine and the noise is not heard. Only happens when in gear and accelerating.
I have determined that I most likely have a bad CV joint - a faint clicking sound while braking that varies with speed that happens with the car in drive, but not in neutral.
I've also found instructions here on how to remove/replace the axle, but I'm wondering if it can be done without separating the tie rod end and removing the ball joint. On other cars I've managed to do this by unbolting the strut, which allowed the hub assembly to flop out enough to be able to slide the axle out of it. Is this possible on the Prius? I have to replace my struts anyway so I was hoping to do it all at once and avoid dealing with potentially frozen suspension components.
I own a 2007. The problem i noticed was that while driving, the AC. was on and suddenly the fan speed dropped and the horns sound also became dim. this was hust like experiencing a loss in power as happens when the voltage drops and the machinery slows down. This persisted for a few minutes to recover back to normal automatically.
This happened a couple of times and then the master warning light and check engine light came on. A couple of weeks back the radiator fan motor dysfunctioned and had to be replaced. I am really concerned as to what is wrong as none of the mechanics have been able to satisfy me with a diagnosis ...
I hear this humming sound when hit 70mph and I am on the gas. However it lasts till 73mph or so and go away!. Below is the pattern I observed;
1. On gas (accelerating), when hit 70mph (not even 69 mph) I start hearing humming sound. It will last till 73mph and goes away. Not able to pin point the source. I feel it is originating somewhere closer to transmission shift.
2. Decelerate from above 73mph and no gas given, when hit 70 I don't hear the sound. Press the gas pedal, I hear.
3. Set the cruise at 70, I hear.
4. The hmmmm sound appears only between 70-73 mph speed and while on gas.
What is this sound?. What is the source?
A couple of years ago I began to hear a high-pitched, metallic, chirping/chittering/rustling noise - sort of like tiny birds or insects - coming from somewhere behind me in my 1999 Toyota Tacoma pickup. The sound would only occur at speeds between about 30 and 55 mph, and would become louder after a long period of driving.
Pressing down the accelerator would bring it on, but it would be loudest and chirpiest during the act of letting up on the accelerator. Coasting down a mountain road with my foot off the gas after a long day of driving made it very loud!
I've had a couple of mechanics listen to it (one elderly car guy couldn't hear sounds that high-pitched) and have sat my brother in the back of the truck to try to figure out where it's coming from. The noise is still there, and can occur at lower speeds than formerly. In fact it's there pretty continuously above about 15 mph, but still varies with acceleration as above.
I have a 2004 F-150 SCrew Lariat 4X4 with 80K miles. Over the past month or so, every once in awhile there would be a loud metallic "clacking" sound (kind of like sticking a peice of aluminum in a bike's spokes) that would start at higher speeds and would turn into a low pitched whirring gear sound as I slowed down and eventually there would be a thud followed by a sensation of running over a small bump and the noise would be gone. Kind of confusing I know, but that is the best way to describe it. My gut feeling is a wheel bearing or transmission problem....
View 9 RepliesI just got my Prius in August. The car makes a humming sound when I accelerate and brake. Is this normal?
View 7 RepliesMy 2010 is humming like bad.....I think it's the rear. the faster you go, the louder it is. Put new tires on - same noise.
View 5 Replies2010, purchased new, 89k. Never a hint of a problem. Last few days, I've notice a low level humming sound at idle. Probably there at speed and swamped by road noise. No change in performance. Temps in the 85 t0 90 range, with AC always at Auto, and at 72.
View 8 RepliesI have a 2004 F-150 STX 2WD with a 2.5" leveling kit on it. I recently have noticed a rubbing sound that can be felt in the steering wheel and gas pedal the instant you turn right. I just replaced both hub assemblies and I just really don't know what it could be. It doesn't happen when you turn left or go straight and there should be no reason as to why my tires rub, because they haven't before. I got my truck aligned and they checked my joints and everything and said that it was fine....
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