Mxer0022
Well-Known Member
Alright all you ecoboost geniuses. Got a cyl 4 misfire on a trip. Stopped at an auto zone and bought a coil pack and new plugs. Only replaced the coil pack and it seemed to take care of the issue. Got home and went on another short trip before I had a chance to replace the plugs and noticed a small miss climbing a steep grade but never threw a code or went into limp mode. Always seemed to happen while under a load. Just finished replacing the plugs and I didnt even make it out of the valley we live in under a very light load it through a cyl 4 misfire code and went into limp mode. Any clue as to where to look next? Should I replace all the other coil packs? Can another cylinder be misfiring and the computer is reading cyl 4? Cyl 4 is front driver side hole right?