2002 Pontiac Grand Am • 191,567 miles

Hello all, I own a 2002 grand am automatic with a 3.4 litre engine. The problem I, m having is the car surges in the passing gear. I have changed the tranny filter and fluid, fuel filter, tps sensor, plugs and wires and still no change in the surging what so ever. What else could cause this problem. Thanks
August 17, 2013.

Has the check engine light come on when this happens? Have you checked fuel pump pressure?