[V8] Hesitation on acceleration

[Greg Furstenwerth]

How many O2 sensors are there on the V8? I only have found 1 but yet
Vag-Com says that its bad? Its not that old the one I replaced?

Thanks

urq wrote:
> >From your description it sounds like a very temporary condition as the
> engine is warming up.  If that is what you are seeing I would suspect the
> OXS as others have suggested.  By any chance do you know if the OXS was
> replaced with a non-Bosch unit?  I did this once, and a minute or so after
> starting the engine would hesitate for a few seconds ... then all would be
> fine.  I suspect the ECU is assuming that the OXS is up to temperature, when
> the part has not yet reached temperature.  I swapped in a Bosch unit and the
> problem was solved.  The OXS I replaced was a new unit, I don't remember the
> brand, but it came from my BiLs FLAPS.  
>
> Happy New Years to all!
> Steve B
> San Jose, CA (USA)
>
> -----Original Message-----
>
> One of my 90 V8s has developed a split-second hesitation on acceleration 
> after it warms up. It always starts great and runs great when it's cold. 
> It also runs great after the hesitation. The TPS has been cleaned and I 
> replaced a couple of temp sensors, thinking the fuel mixture might be 
> too rich after warm-up.  This car sat for 6 or 8 weeks while the 
> xmission was replaced.  Before that there was no problem.
> I've found some list emails on similar problems, but, unless I missed 
> them, none where the problem occurs only after warm-up.
> Any ideas?  If anyone knows the answer, V8 listers do!
> Thanks for any help.
> Larry G.
>
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