2000 Grand Prix GTP 184xxx miles
Guys I need some help here!
When the car is just idling, whether Im sitting in the driveway or at a light there is no CEL, when i accelerate or push on the gas pedal after about 30 seconds the CL starts flashing. When i go back to idle after a minute or two the light goes off. Checked it with the scanner and it shows misfire in cylinder 3. Car doesn't run rough so i don't think it really is misfiring. My scanner wont do live data so I can't look at that but i have pulled the wire and the plug and it is firing like it supposed to. I have swapped and replaced plugs, wires, coil and injector and it is still doing the same thing. Thought it might be a manifold gasket but it doesnt make sense that it would go away at idle.
Any ideas?
