Whining noise under boost
thequattroking at yahoo.com
Wed Feb 13 20:01:59 EST 2002
Congrats!! Although unlikely, check that your air cleaner box is tightly
sealed. I had this happen once.
Enough Audis to give plenty of headaches.
Parting: 1972 Mercedes Benz 280 SE 4.5
> My newly-acquired '90 200TQ20v (Europe) have a strange noise under
> boost. It sounds just like an air leak, but the pitch it much lower
> than the usual turbo whine. Could it be the bypass valve leaking? I
> can hear the valve working (a "dumping" sound) when I go off the gas
> pedal under boost. The dash gauge only reads 1.4, so I guess I have to
> check out a few things..
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