Thor Forums

[Lt Keefer]

Clear the code and see how quick it comes back, if it does at all. Then swap the coil pack with another cylinder. If code moves, replace coil pack. If it doesn't, replace spark plug. If you still get the code you need further diagnostic tests that are above my pay grade. You could watch some videos from South Main Auto or Pinehollow to get an idea on further diagnostics. They are both on Youtube. Good luck.