Help, 93 S4 loss of power and turbo whine

[BBBurban at aol.com]

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Just posted this to the S-Car list...hoping some one on the main list will =
have an idea as well.

Thanks all

Hank
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From: bbburban at aol.com
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Date: Thu, 21 Feb 2002 18:39:49 EST
Subject: [s-cars] Help, 93 S4 loss of power and turbo whine

The car is a 1993 S4.  Noticed a lack of power lately as well as no whine f=
rom the turbo spooling up.

Suspected the bypass valve was bad and when removing it found that it was m=
uch easier to move the old valve than it was to move the new one.  "Great" =
I thought... only $35 from local Audi dealer and it was in stock.

After replacing it though I still feel a lack of power and still no turbo w=
histling merrily in my ear.

What should I look into next??  There is no boost gauge in the car so that =
is no help.  I don't think this is the famous torn boot syndrome as I can't=
 hear the turbo spooling at all.  Is it possible there is a problem with th=
e turbo itself??  I was told when the trubo goes it will spew oil smoke out=
 the exhaust ect but I am not sure this is true and would like to hear from=
 the list on that topic.  Is it possible that I damaged something by runnin=
g the car with a bad bypass valve?

Thanks to all in advance,

Matt 93urS4 123,000

(sent in by Hank 90q20v)

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