Pontiac Grand Am 2.2 stick shift po301

Question

Car ran fine until I changed the plugs

Answer 1

Hi there

If the plug boots have any oil on them it can cause this, if not, then you are likely looking at replacing the ignition coil/cover to resolve the problem. You can also try swapping the #1 plug to a different cylinder and see if the misfire moves with it. Sometimes new plugs fail.