I have a 2003 Pontiac Grand prix limited edition, recently I changed the crankshaft position sensor, all three coil packs, I installed new top of the line plugs and plug wires and I replaced the Catalytic converter, and I still have an issue with the tach jumping around and the engine just doesn't have the power to climb hills. I recently noticed that I can step on the gas and the speedometer takes about 1.3 seconds to respond! Any one out here in GP land have any ideas or helpful hints I would greatly appreciate the input....snorty
