Help Needed -- 1988 5000KSQ

[Ben Swann]

A few educated guesses - in short the car runs but has no power. 

The air fuel mix is likely off and probably there is an intake tract leak.  If it were
post turbine, the car would likely run funny and have no real boost, but still get out
of its way.  It therefore sounds like there is a serious leak from the air boot "waffle
hose" down to the turbo somewhere.  I would hazard a guess that the waffle boot is
simply not seated on the fuel distirbutor and you'll find an easy fix.  Else there is a
rip in one of these hoses, and maybe one blew off at the intercooler ofr turbo - under
car.  Could even be the Michelin Man hose (goes from intercooler to the throttle) and
they rip all the time - just with that tear the car should still be able to run, just
not get positive boost pressure.

So - pop the hood and start looking.  I bet you find it is an easy fix - might need a
temp repair with some tape and goo if it is a special hose - namely the waffle hose.
The intake tract need to be tight in order for air to be pulled in by the engine whereby
fuel air plate is lifted and proper mixture attained for engine to run correctly.  

Might be temp sensor, O2 sensor, or some ECU related problem, but I'd check for  air
leaks first.  Would have to be one hell of a clogged fuel filter for that to be it and
fuel pumps generally cut and go - a bucking.

That is my SWAG at it.  BTW MTFS really has nothing to do with engine operation - all
coolant/temp related which is a separate harness.  There is a separate CTS for the
engine/ECU.


Ben


[From: b1biker at aol.com
Subject: Help Needed --  1988 5000KSQ
To: quattro at audifans.com
Message-ID: <8CABE4085D2F287-960-A3F at WEBMAIL-DG03.sim.aol.com>
Content-Type: text/plain; charset="us-ascii"

Fellow listers, one more problem in the continuing saga of resurrecting this car.
Yesterday I installed a new power steering pump and a 'new' from the boneyard
multifunction temp sensor. After completing the work I discovered that once the vehicle
reaches operating temp it will no longer rev and has difficulty even pulling itself; it
almost seems as though it doesn't have enough fuel. Fuel pump is new but seems to have
gotten quite a bit noisier with the onset of this problem. I suspected the temps sensor
so replaced it with the original unit but the problem persisted. I pulled the fuel pump
to see if the screen was plugged; everything seems to be OK. Any help in finding the
source of this problem will be greatly appreciated.
Gary Meier]