XJdunnz New member Feb 28, 2011 #1 Check engine light came on my 97 xj 4.0 today, code reads p0301 cylinder 1 misfire the jeep feels like it's running fine. Just wondered if it's bad spark plug or something more serious.
Check engine light came on my 97 xj 4.0 today, code reads p0301 cylinder 1 misfire the jeep feels like it's running fine. Just wondered if it's bad spark plug or something more serious.
Jester32 New member Feb 28, 2011 #2 Pull a plug have a look. It will tell u how that cylinder is running.
SteelHeadz Super Moderator Feb 28, 2011 #3 Swap the #1 #3 and see if the misfire moves. If it does, the sparkplug is most likely the culprit.
