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Hesitation....




recently my car picked up a bad hesitation......it will struggle form a
dead stop and then "catch" when it hits above 3k rpms........

it runs fine when first started.....but then has idle fluctuations.....it
will give a steady idle though, if left to "calm down" by itself....so, i
dont suspect the idle stabilizer.....and i have replaced the in tank
transfer pump..

it runs fine once you get going from a stop......and the problem only
occurs after the car has warmed up.........

any ideas/insights would be appreciated....i want to fix this problem as
it is very annoying...

i also checked for cracks in the intake boot that goes to the throttle
body, but found none.....wiggled it around while the car was running and
no change in the engine performance/idle....

i'm guessing it might be the fuel pressure regulator...but i'm not sure
exactly how it interacts with the whole fuel system.......and also,
guessing that it isnt the main fuel pump, since plenty of fuel pressure is
(aparrently) generated when the car is run full throttle.....


dave
87 16v




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