Annoying whine or hum under light throttle *video*
#1
Annoying whine or hum under light throttle *video*
I know there are some scattered threads here and there about something similar!
But I'd prefer this was in the general section where it may get more feedback and traffic. Under light throttle my car exhibits an annoying hum. As soon as I let off of the gas it stops, if I am hard on the gas it is not there. Unfortunately this hum is present at 60mph which is where I spend most of my time. I had the differential oil changed today and it did not change. I recorded some video on my phone and the sound is quite obvious. Please have a listen and let me know what you think!
http://www.youtube.com/watch?feature...&v=G7SGpvciApQ
But I'd prefer this was in the general section where it may get more feedback and traffic. Under light throttle my car exhibits an annoying hum. As soon as I let off of the gas it stops, if I am hard on the gas it is not there. Unfortunately this hum is present at 60mph which is where I spend most of my time. I had the differential oil changed today and it did not change. I recorded some video on my phone and the sound is quite obvious. Please have a listen and let me know what you think!
http://www.youtube.com/watch?feature...&v=G7SGpvciApQ
#2
I've listened most carefully to your "hum" and I instinctively went for something in the silencer/muffler area; my close second choice was torque converter lock up clutch noise. Of course, since I've wrestled (successfully with the help of this website) with my own T.C. clutch, I could be prejudiced.
If it's originating in the clutch, it may be that when the box is fairly cold, the noise is not present. So if you get the noise within a minute or so after setting off, it's prob. not that clutch.
The silencer/muffler could have loose baffles, so try restricting each tailpipe slightly with something suitable to see if it makes any difference.
The noise also reminds me of air input noise (like operating the engine without an air cleaner), so look around the air hoses for any subtle leaks; maybe this effect could create an errorcode?
BTW, good idea recording the noise.
Leedsman.
If it's originating in the clutch, it may be that when the box is fairly cold, the noise is not present. So if you get the noise within a minute or so after setting off, it's prob. not that clutch.
The silencer/muffler could have loose baffles, so try restricting each tailpipe slightly with something suitable to see if it makes any difference.
The noise also reminds me of air input noise (like operating the engine without an air cleaner), so look around the air hoses for any subtle leaks; maybe this effect could create an errorcode?
BTW, good idea recording the noise.
Leedsman.
#3
I've listened most carefully to your "hum" and I instinctively went for something in the silencer/muffler area; my close second choice was torque converter lock up clutch noise. Of course, since I've wrestled (successfully with the help of this website) with my own T.C. clutch, I could be prejudiced.
If it's originating in the clutch, it may be that when the box is fairly cold, the noise is not present. So if you get the noise within a minute or so after setting off, it's prob. not that clutch.
The silencer/muffler could have loose baffles, so try restricting each tailpipe slightly with something suitable to see if it makes any difference.
The noise also reminds me of air input noise (like operating the engine without an air cleaner), so look around the air hoses for any subtle leaks; maybe this effect could create an errorcode?
BTW, good idea recording the noise.
Leedsman.
If it's originating in the clutch, it may be that when the box is fairly cold, the noise is not present. So if you get the noise within a minute or so after setting off, it's prob. not that clutch.
The silencer/muffler could have loose baffles, so try restricting each tailpipe slightly with something suitable to see if it makes any difference.
The noise also reminds me of air input noise (like operating the engine without an air cleaner), so look around the air hoses for any subtle leaks; maybe this effect could create an errorcode?
BTW, good idea recording the noise.
Leedsman.
No error codes, and it seems to do it even when I just start out. If it were the baffles wouldn't it do the same thing when the car was parked? It only makes this sound at highway speeds. So your issue was your TC? If so was it replaced or how did you fix the noise?
#4
The exhaust gas throughput will be different if you just rev. the engine when stationary, the silencer/muffler noise may well not show then. The noise sounded like something "tuned" or resonating. (And of course, silencers and pipes are tuned on purpose for power or economy). Autobox noises were stopped when I had the ATF fluid changed, that was in a 6HP26 ZF.
Try having a passenger with good musical ears who also has good stereo hearing see if he/she can pinpoint the area of the noise. I once had a Peugeot SRD. model that made a noise like bagpipes in the distance around 45mph. This was the way the wind whistled round some suspension parts in front. BTW, have you made any body additions?
Leedsman.
Try having a passenger with good musical ears who also has good stereo hearing see if he/she can pinpoint the area of the noise. I once had a Peugeot SRD. model that made a noise like bagpipes in the distance around 45mph. This was the way the wind whistled round some suspension parts in front. BTW, have you made any body additions?
Leedsman.
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Pushing_Tin (11-20-2010)
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