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C_Richard1
04/30/2009, 6:33PM
About: Audi A6
'01 2.7T Manual - Strange Whistling/Humming Noise...

Has anybody else had this problem?

I love me the sound of a turbo, that high whistle you get when you accelerate hard.  My A6, however, has been
doing a little more than just that.  If I accelerate hard enough (in any gear, except maybe reverse, which I haven't
tested), I will get a strange, lower-pitched whistle/hum coming from the front of the car.  It almost sounds like
the horn is firing automatically, but I tested that and found that the horn is MUCH louder and more annoying.  So
this is... A mystery.

Are the turbos about to poop?

A6
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