I have a 2000 Grand Prix GT that I use for my daily commuting but lately it has begun to surge when I am in a light to mid acceleration (Usually between 1700 and 2200 RPM) you can actually watch the tach jump back and forth 200, 300 and sometimes 400 rpm. I don’t think that this is a fuel problem because when I hammer on the throttle the car drops a gear and before I know it I have more than exceeded the speed limit (I also just changed the fuel filter). The car doesn’t misfire, just changed the plugs and wires about 4 months ago, and it doesn’t really feel like a misfire when it occurs. (most noticeable when climbing a hill)
Just thought some one may have had a similar problem with the 3800 series engines.
Any thoughts would be of a big help (and may prevent me from burning the car out of frustration)