Ford - Thunderbird :: Fan Coming On Occasionally / High Pitched Whining Sound
Feb 16, 2013
My 2003 T-Bird (52,000 miles, original owner and only driver) has a fan coming on occasionally (in front) while I am driving. No warning lights. It goes off when I shut off the engine but then I get a high pitched whining sound (in front) that shuts off after a few minutes. I took into the dealer and they checked out my radiator level (full) but found a pinhole leak in the radiator hose. "The engine is not overheating, not to worry, fan is electronic and is normal". I don't think its normal since this is the first time its doing this after 9 years. Could this be the same problem as Elaina is having: An evaporative emissions pump sticky valve or leak in this system?
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A high pitched squeal appears to come from the front of the a/c compressor whenever the clutch engages. When the clutch disengages the compressor stops spinning, and the squeal stops. I can watch and listen to this as the system cycles with the a/c switched on. If I turn off the a/c, no squeal. I'm guessing the bearings in the compressor are going out. However, the system still cools normally, so apparently no gas has leaked out.
Does this imply the compressor must be replaced, or could injection of some oil into the system possibly fix it...?
This car only has 73,000 miles on it. I've owned 2 other TB's and a couple classic Mustangs with much higher miles and never seen an a/c compressor bearings fail.
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Yesterday after a 45 minute drive home (GA and above 90 degree heat), I noticed a moderately high pitched whining noise after shutdown. The noise continued for about 5 minutes. From my understanding, the inverter coolant pump redistributes the coolant after shutdown and I have heard a humming noise previously which I assumed to be this action.
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Turned my car (07 SE v7 with 240k on the clock) on this AM and there was a high pitched whine coming right from the engine bay - matched to the revs of the car, regardless of gear.
This is a new noise to me and the car - but I'm assuming it's some kind of belt issue.
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So I'm driving home late at night, few cars on the highway, I turn off the radio and I hear a faint, very high pitched whine coming from the engine bay when going 40-50 mph. It sounds like an electric motor spinning at high speed and frankly it's a bit irritating. The sound is there whether the engine is running and charging the battery, the car is using the traction battery or it's coasting and regenerating power. The sound stops for a moment if I gently accelerate and then lift off, but it comes back on coasting.
It's different from the louder, low pitched subway-train sound that comes from regen braking at low speed. Could this be the dreaded CVT whine reviewers complain about? Or is it the normal sound of the MG1 unit? This car is really quiet so weird noises pop up more.
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I have recently noticed that there is a loud, high-pitched whistling sound coming from under my hood that has progressively gotten worse over the weeks. At first, it would only occur when I had my AC or heat on and would stop immediately once i turned the AC/heat off, and will also happen from time to time when I accelerate. Now, this noise is happening right when I start my car and takes a few seconds to stop.
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I have been getting a loud, high-pitched mechanical-sounding noise coming from the middle of the dash, near the CD player. It lasts only a few seconds, but it scares the sh!t out of me every time! It happens out of the blue after I've been driving for a few minutes about every 3 weeks or so. The sound is almost impossible to describe...but if you've had it happen you probably know exactly what I'm talking about. It happened today while I was listening to a CD, so I can't imagine it's the player that's doing it. Non-Nav/Air V8
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My 337 didn't pass inspection (control arms, inner tie rod, no cat because the guy I bought it from sucked etc) but it sat for probably 3 weeks and I just sold my other car (I was planning on using that $2000 to get the 337 to pass inspection) but I just drove the VW down the street for the first time and it's making some scary sounds.
Basically when I give it throttle there's a high pitched whirring sound and something keeps rattling that sounds like its coming from the engine bay. I'm really freaked out, I'm leaving in two months because I'm transferring to a new college and I need this thing to run perfectly.
It's also shifting a little strangely and if you don't shift absolutely perfectly then it starts to rattle (not like you're about to stall but something completely different) I can't take it to a VW dealer or anything because I'm way over the 15 days past a failed inspection and I can't afford a tow.
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I've got a steady and consistent high pitched whine coming from the rear of the car. It's only audible when the car is running idle and/or at a standstill, A/C and radio off. Also can't be heard while driving. I've ruled out any rear diff issues and thinking it might be the fuel filter. I recall noticing the sound soon after getting the car, however it's gotten more prevalent recently.
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I noticed my truck makes a high pitched whining noise. It does it at idle and while acceleration up to 40 mph or so. The pitch of the wine increases with RPM'S. It is not the cold start whine issue I have researched on YouTube.
It is in the cold or warmth. No difference. It's always there. My 2012 6.2 did not sound like this at all. I have crawled under the truck and it appears like it is coming from the transmission.
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I got in my car today and realized it was making a whining noise, kinda like the whine of a super charger, I don't hear it at idle but when I accelerate or rev it in neutral it gets louder and higher pitched. Friend had this problem in his Mercedes and he said it was a bad belt.
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I've noticed more and more that when I am braking that I heard a high pitched whining noise. Sort of this ultrasonic type sound. It will only go away if I depress the brake pedal very firmly after being completely stopped. However every so often the firm press will not stop the noise. I hear it more in the evening on the way home than in the morning to work, though I may not be paying attention as much in the A.M. due to morning brain fog.
I don't hear it any other time. I'm worried something is wrong with my inverter.
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"93 Subaru legacy 175,000 miles: Just picked it up yesterday after timing belt/water pump replacement. Now it makes a high pitched whining noise sounds like from engine, the mechanic called it a whistle, but it ain't no whistle and wasn't there before.
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After it has been sitting overnight, I hear a somewhat high pitched whine while driving the car. It seems to go away after the car warms up a bit (maybe I can't hear it). Here are a few other details
a. 2006 Sonata 3.3 V6, ~85K miles on the odo
b. Transmission fluid flushed at Valvoline ~2 weeks ago. I changed it at 39K miles when I bought it. Checked at 78k miles and the color was was good (light red).
c. The noise goes up and down with engine rpm. I have a sound (wav) recording of it, but cannot figure how to attach it.
d. I tried putting it in park and neutral and revving the cold engine, but cannot hear the whine-only happens in drive.
e. Engine oil changed every 3-5k (wife drives it, so I'm not always prompt).
It shifts smoothly (always has) and otherwise drives well.
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I know this noise is the Thermos Pump and it operates when I turn the car on and off. Question - is it failing - also a really annoying noise, but I'll put up with it as long as nothing's breaking.
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Starting about a week ago whenever my car goes above about 2 thousand rpms I start hearing a faint high pitched whining sound, increasing to a more audible level as the rpms increase.. I've ruled out breaks and tires, which weer my initial thoughts, and I think it's something with a belt or the engine now. I have manual shift 2002 Hyundai Elantra.. The car still performs fine, but I have noticed a slight decrease in acceleration speed..
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I have a 2009 Toyota Yaris with 35,000 miles, and fully up-to-date with all the 5,000-mile usual maintenance checks [no prior problems]. Driving on a hot day, I hit Bakersfield and the car started to make a high-pitched whining noise, which got louder with the accelerator and softer when I took my foot off the gas. I thought perhaps the car was overheating and let it rest for a while, and checked the coolant [which was at a normal level]. I finished the drive to LA and stopped by the Toyota dealer who said it must have just been the fan given the hot weather.
The noise went away overnight, but the next day I was driving around town when it was overcast and cool, and even driving locally, the car made the whining noise intermittently, especially loud at low speeds like coasting in a parking lot, and the noise has been getting louder and sounding more pathological--not like a normal engine or fan noise, but like a truly problematic high-pitched straining sound. Sometimes it comes on when I start the car, sometimes restarting the car makes the noise go away for an hour or two.
It sounds almost like an electric razor being whipped around like a numchuck - a hitch pitched whine that is rotating in the engine and speeds up with the accelerator and calms down but doesn't go away at a stoplight. Perhaps I finally ran over my neighbor's annoying kitty. But today's latest Toyota mechanic also couldn't figure it out because the noise didn't start when he turned on the car and didn't restart on his test drive, but only a few hours later after I'd driven the car around town.
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This morning I just began noticing a low pitched whining sound when I accelerate at low speeds (below 30 mph). The sound seems to disappear at higher speeds for some reason. It bothered me so much that I arranged to have all the timing belt service done....I have been putting this off....84K miles now on a V6 Passat. I'm thinking it is the water pump noise, but I am not an expert on cars like most of you are. What all SHOULD be done when you change the timing belt?
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Yesterday as soon as I started my car, I noticed a high pitched whining noise. As I drove, it seemed to stop, but as I slowed down and idled, it came back. After driving a couple miles, the battery light came on, so I turned off the AC, radio, and lights and it went off again, but as I sat at stop lights it would flicker on and off again.
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I bought a CPO 2010 Camry LE (2.5 4 cyl, 6 sp auto) a few months ago. The car had around 34K miles when I got it, and ever since then, it has had a high pitched whining noise when accelerating or revving the engine in park. It is noticeable from around 2500RPM up, and seems to be a little louder when the engine is cold.
I have left it at the dealer twice, and both times they have come back and said it is normal. I can't believe this, because I have owned many cars over the years, most of them being fairly dilapidated, yet most of them haven't had a noise like this. I think I have read a comment online somewhere that an issue like this was found due to a bad power steering pump .
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This is an ongoing problem that has lasted for several weeks now -- I’m completely flummoxed and at a loss. It goes something like this:
My truck (2000 Dodge Dakota, 2.5L, 5-speed) has developed -- for lack of a better term -- a high-pitched whining squeal, which only occurs after I put it in gear and actually start moving (if I leave it idling in neutral, when starting it after letting it sit overnight, the sound usually does not appear at all). After about three or four minutes of driving time, the sound will show up, but there’s an odd twist: the sound is most apparent, and really loud, when the truck is at idle, such as when at a stop sign or traffic signal; when I put it in gear and take off, the noise will drop in pitch and, depending on how hard I’m pressing on the accelerator, it sometimes disappears altogether.
When I take off, every time I shift gears the sound returns -- only for as long as I step on the clutch and back off the gas, and when I step on the accelerator again the noise falls in pitch and vanishes. It does this off-and-on thing through all the gears, and after reaching the desired road speed (and I’ve reduced pressure on the gas pedal) the sound returns and is constant. Also, if I shut the truck off and wait just a few minutes, and then fire it back up, the sound will be gone, but will return after a short while, exactly as related above. It’s worth noting that, during all this irritating misadventure, the engine has run exactly as it always has -- there’s been no discernible impact on performance.
Now, some considerations. The noise is louder and more strident when the ambient temperature is lower, such as in the morning. Later in the day, when the temperature rises, the sound becomes erratic and somewhat unpredictable, and is much lower in volume, and it will even stop abruptly and then reappear later.
Many people have suggested that it could be the belt or a pulley, maybe. I replaced both tensioners and even installed a new, shorter belt to bypass the A/C compressor (to eliminate it as the possible culprit), but the noise remains. I was skeptical of all that because -- and please correct me if I’m wrong -- a shot pulley making such a horrible racket should get louder as engine speed increases, not drop in pitch and disappear. In fact, the noise seems to have no relation to engine RPM; if anything, it seems tied somehow to intake manifold pressure (the sound vanishes when the truck is accelerating, which is when intake manifold pressure goes down, or so is my understanding), or throttle position, or something else entirely. The vacuum system? The noise seems mechanical to me, not like escaping air (or, well, vacuum) . . . but what do I know?
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