Re: 91 200TQ Stalling

["Mike Miller" <JoMi@email.msn.com>]

Change the turbo bypass valve. It's leaking unmetered air into the intake
system. Under $40 from Linda.

mike miller
91 200q

-----Original Message-----
From: Oscar Murphy <rmurphy@batnet.com>
To: quattro@coimbra.ans.net <quattro@coimbra.ans.net>
Date: Wednesday, April 01, 1998 3:56 PM
Subject: 91 200TQ Stalling


>QListers,
>
>We have a nagging problem with our 1991 200 TQ (20v) sedan. To date it has
>perplexed 2 dealers and 1 independent mechanic. The car has 98K miles on
>it.
>We've owned it since new and have had all regularly scheduled maintenance
>performed at the local dealer.
>
>SYMPTOM:
>Car stalls on when shifting @ 3000 rpm after hard acceleration. If I shift
>at a higher or lower engine speed the problem doesn't occur. If I
>accelerate normally, it doesn't ocur.
>
>I have noticed that as I pass through neutral when I shift @ 3000 rpm after
>hard acceleration, the tach needle drops to 0 rpm and the car stalls.
>
>Under other shifting conditions, the tach needle drops to ~500 rpm and then
>bounces up to ~800rpm as I pass through neutral.
>
>ATTEMPTED FIXES:
>1) Engine speed sensor replaced
>2) Injectors cleaned, later replaced
>3) Throttle position sensor replaced
>4) Breather hose and vacuum  hoses replaced
>
>No new diagnostic failures reported on computer readouts after the engine
>speed sensor was replaced. Various electrical tests performed per Audi
>repair procedures check out within tolerances.
>
>As you can probably tell, I'm not a mechanic so I may not have given enough
>info here. Any help would be greatly appreciated.
>
>Regards,
>Oscar
>
>