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RE: 20V acceleration loss
Thanks for the interesting advice. As a matter of fact, my fuel pump
becomes very noisy at high temperature - even so that I can hear it in the
vehicle after shutting down and restarting hot. I have wondered whether my
pump is getting weak. Did you experience the noise with yours?
At 01:18 PM 7/31/97 -0600, you wrote:
>Your problem sounds very familiar to one I experienced with my 87 5KCST.
>I found that the problem was caused by a plugged inlet screen on the
>fuel pump. I found the fault by monitoring fuel pump pressure under
>conditions that produced the problem. The pump screen had a film of
>what appeared to be silicone sealant covering it. I expect the film
>came from a batch of contaminated fuel. The problem started as a sumble
>and miss at full throttle on hot days. It progressively got worse and
>one day I found myself stranded between two hills on a hot day. After
>the sun went down things cooled enough that I made it home for more
>troubleshooting. I won't go into the detailed explanation of what was
>happening but it all makes sense. The main fuel filter could produce
>similar problems if plugged and that is the first thing I'd try but
>getting at the pump and cleaning the screen isn't too hard if Audi
>didn't change the tank design between our models. I made my own tool
>for removing the pump retainer and did the job in less than an hour.
>Try my suggestion since it won't cost much and could solve your problem.
>It took me two months to track the solution down on my Audi.
>If you don't care where you are, you ain't lost.
>95 F-250 Powerstroke 4x4
>91 Suzuki Sidekick 4x4
>84 S10 4x4
>67 Porsche 912
>71 VW convertible
>> From: Ralph Poplawsky[SMTP:email@example.com]
>> Sent: Thursday, July 31, 1997 9:27 AM
>> To: firstname.lastname@example.org
>> Can anyone help me? My '91 200TQ 20V has acceleration loss and the
>> may own my house before it is fixed. The symptom is as follows. The
>> runs like a top up to about 1/2 to 2/3 throttle. After that there is
>> intermittent power loss varying from a 'missing' feeling to cutting in
>> out to stumbling along and hardly accelerating. If I back off on the
>> throttle when this happens, the engine smooths out and acceleration
>> increases. The problem appears to be worse in hot weather. The boost
>> reads full boost. Repeated acceleration runs sometimes result in
>> Some background: Several years ago, there was a similar problem, but
>> boost loss. The dealer spent $5000 (in warranty) swapping parts to no
>> avail, and finally figured out (from the factory) that the cam timing
>> slightly off, the computer was sensing too much advance and shutting
>> boost. The current problem began after the 60K mile service at which
>> the dealer replaced the timing belt. I don't know if the current
>> problem is
>> related to cam timing or the 60K service, but I'm suspicious.
>> So far, my dealer has charged me $250 for a new O2 sensor which has
>> fixed the problem. He wants the car back to 'go further' but can't
>> say what that means. The owner of the dealer suggested that the
>> service rep would be in, so why not have him look at it. So, I gave
>> him the
>> information and later heard from the dealers' service department that
>> he had
>> nothing to say about it because he is only interested in 'in-warranty'
>> If anybody has had this problem, or has any good advice. I would be