1950StangJump$
forum member
- Joined
- Apr 1, 2010
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Gonna give you guys a shot before I post to Facebook. 2008 GT with T56 Magnum, RST, 4.10 rear gears, Stage 1 Kenne Bell, Kooks headers, high flow cats, VMP Triple Pass, GT500 intercooler pump, Pedders coilovers and numerous BMR suspension components. 23k miles on the odometer.
Today, I noticed a high pitch whine noise coming from outside the car somewhere (definitely not the interior). It was like a high pitched whistle, only it was constant and a higher frequency than a supercharger. I could not isolate to the left or right. Here is what I learned trying to figure it out:
Any ideas?
Today, I noticed a high pitch whine noise coming from outside the car somewhere (definitely not the interior). It was like a high pitched whistle, only it was constant and a higher frequency than a supercharger. I could not isolate to the left or right. Here is what I learned trying to figure it out:
- No change to vehicle performance
- Appeared to only start when the engine and car got hot.
- Doesn't change with engine speed -- I can rev in neutral while coasting and it doesn't change the sound.
- Doesn't change with vehicle speed EXCEPT that it will always stop when I slow to under 5 mph (and to a stop). So, there is no difference in the sound if I'm doing 40 or 20 mph.
- Turning the AC on or off makes no difference
- Doing anything with the transmission doesn't change the sound, i.e. doesn't start or stop at all if I push the clutch in, change gears, put in in neutral, etc.
- I cannot replicate idling or revving in place, which obviously makes it hard to diagnose.
- Doesn't sound like any gear whine I've ever heard -- and the sound does not change with speed at all like a rear gear whine.
- I have a kill switch on the VMP fans, but killing them makes no difference. I didn't try killing the GT500 pump, but I can't believe a noisy pump would get quiet when the car slows to a stop.
Any ideas?