I have a grand prix equipped with a 3800 series II and were experiencing the same problems. I decided, after 2 mechanics, wasted money, changing out the crank sensor, fuel pump, and cam sensor, to take it to the dealer. My car didn't have any service engine faults and highly recommend taking it to the dealer for a diagnostic because it could be any number of things. The dealer determined in my case that the mass air flow sensor had gone bad.
Saturday, May 5th, 2007 AT 3:26 AM