'95 90qs: Cut Out, etc. ECU!

[Elliott Potter]

I think your dealer is reading the book instead of diagnosing the
problem.  The shop manual has a section with 77 fault codes, of which 41
have the list of corrective steps ending in "Replace ECM J192."  I had a
similar experience at my dealer with my air conditioner -- the book said
"replace the high pressure sensor," so they did.  Four times.  Then the
computer, 3 times.  Then the low pressure sensor a few times.  After 6
YEARS of this they finally found the loose wire.  Shortly after that
they had to replace the entire A/C system because it failed altogether
from 6 years of abuse.

Make sure they have a good reason for wanting to replace the ECU! 
Remember that towing the car to another mechanic is still cheaper than
the ECU.
--
Elliott

"Dan Z. Johnson" wrote:
> 
> A final update: dealer says it's the ECU. Anyone know of good prices on a '95
> 90q ECU? I'm peeved, big time.
> -DanZ
> 
> "Dan Z. Johnson" wrote:
> 
> > Thanks for all the quick and detailed responses. I changed the two O2
> > sensors yesterday (with the generic Bosch plug from Blau). The car ran much
> > better, but, alas, it did not solve the problem. I reluctantly left the car
> > at the dealer (Holbert's in Warrington, PA) yesterday evening. I say
> > "reluctantly" because it died in their parking lot. They suspect a bad fuel
> > pump. We'll see what happens when the car surgeons are finished.
> > -DanZ
> >
> > "Dan Z. Johnson" wrote:
> >
> > > Hello,
> > > My 1995 Audi 90q (73k miles) has a real problem. It started
> > > as the occasional stall at idle, then progressed to quick,
> > > intermittent cut out while driving. Now, at road speeds, the
> > > engine will sputter rapidly and die altogether, and be
> > > nearly impossible to restart. Car backfires slightly. After
> > > letting it cool a bit, I can restart and sometimes run for
> > > 1/2 hour or more with no problems.
> > > At first, I thought that i had gotten a bad tank of gas. Ran
> > > some methanol through, with limited, short-term success. may
> > > not have helped at all, in retrospect. I am two tanks of gas
> > > past that first suspect tank. I have run injector cleaner
> > > through before and after this started. All panel indicators
> > > are normal.
> > > Any ideas?