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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.