89 200tqw stalling & hard start

[Lawson, Dave]

Dave
>Car is a 89 200tqw dual-knock.
>
>Car runs like a scalded cat at all times.  Stalls under decel.  Also, car
>runs very rough under idle.  If car dies at idle and at times after coming
>to a stop . . . no restart for a few minutes.

At the beginning of the summer I had some weird behavior on on 1990
200 TQ avant, wooshing sound under acceleration, funny idle behavior,
but no stalling. Everone always suggests to check the ribbed i/c to
throttle body hose for leaks under pressure. I did that and it was fine.

qshipq then suggested to check out the turbo to i/c hose, it seems on
the dual knock cars, Audi changed this hose from a rubber U, to a rubber
U which goes into a oil trap/filter section and then into a bellows section.
Sure enough the bellows section had good 2 in tear in it which vented air
under boost and when the engine moved under accel. I replaced the U 
hose with spare I had from a 1988 MC engine and everything works fine.

Good luck.
-
Dave Lawson