91 100 CSI-E III...stalling hot

[Joshua Van Tol]

John,

Have you tried plumbing in a fuel pressure gauge positioned where you can
see it from the driver's seat? That and a test light wired in parallel to
the pump should tell you whether you've got a fuel pressure problem, and if
so, whether it's the pump, or the power supply to the pump.

We used to do this all the time at the shop I worked at. Just instrument the
car with pressure gauge and test light, and go for a drive.

On Mon, Sep 28, 2009 at 10:01 AM, John Gourley <azaudi at gmail.com> wrote:

> For anyone that has or has had an Audi with CSI-E III NF
> engine..........been fighting a problem with the wife's 91 100 FWD.  When
> the ambient temp gets to 98-100 degrees or more, the problem can happen.  I
> take a 50 mile drive on the freeway to Tucson,AZ....runs fine...then during
> the course of stop and go driving around Tucson, it sometimes acts up.  I
> get a slight two or three jerks and the engine shuts down.  Jerks might be
> too strong a description, the passenger won't even feel it.  Feels like the
> fuel is shutting down.  So I sit parked on the side of the road for maybe
> 15
> minutes.........then starts right up and may run fine for another 20
> minutes
> of stop and go driving then shuts down again.  Yesterday was about 100
> degrees in Tucson...it happened.  So we found a restaurant, had a long
> lunch
> and one hour later took off fine.  Drove 10-15 miles of stop and go
> driving,
> got onto the freeway and headed the 50 miles home.  It ran fine.  The
> longer
> I let it cool down the more miles I can probably drive before shutting down
> again
>
> Something is warming up and shutting off, causing the problem AND if
> ambient
> stays under 95 degrees there is no problem.  Seems to take a combination of
> an hour or so of highway driving and then city stop and go.
>
> Has anyone ever had the fuel distributor cause such a shutting down
> problem.  I know a dirty or otherwise bad fuel distributor can certainly
> make for poor running...but can it actually shut down an engine?   I've
> never seen that happen but I haven't seen it all!
>
> I mention the fuel distributor because most other parts are new.  New fuel
> pump, new pump check valve, new accumulator, new fuel pressure regulator,
> new injectors, new temp sensors (both of them) new oxy sensor, new fuel
> pump
> relay, new cold start valve
>
> Wish this car ran as good as my old reliable 89 200 TQ avant!
>
> thanks for any ideas or suggestions
>
> John Gourley
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