I seem to be having 2 different hesitation problems that may or may not be related. At about 2200 rpm i get a hesitation that repeats itself until rpms are increased or the tranny shifts - most noticable on an incline.
Also at close to WOT at speeds of 70-110kph the car hesitates once a second approximately for about 4 seconds.
Things I have done:
Changed fuel filter
Cleaned injectors
Changed transmission fluid and filter
Installed transmission cooler
None of this symptoms occur during the first 30 minutes of driving. I am a courier so 6000km has passed since the first occurence.

it's weird that u mention this, cuz my sister's cavy's been doin this lately...

as for the alero, the only time i had hesitation was when my fuel filter got so plugged up that i couldn't blow through it anymore....but the dealer said that even tho i had a new filter, it could still hesitate, and if it did, i mite be lookin at gettin a new gas tank...i hope for your sake that's not it...

Yea, that's what I was going to say. You might have crap in your tank that keeps gettin to the fuel filter. Have you at least had it checked out by a mechanic? Or did you just do all of those things yourself.

tranny's gone - something bout servos - damn

HC that sucks man, let us know how it gos :thumbsup: