03 Expedition 5.4L Cylinder #8 Misfire
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03 Expedition 5.4L Cylinder #8 Misfire
Check engine light came on, read code, cyl #8 misfire, replaced all Plugs and Coil Packs, ran great for appx 2 weeks, started running badly, read code, #8 misfire: swapped #4 with #8 etc, reset codes, read code again, #8 misfire. Any suggestions or thoughts? I do not understand "why" it ran so good for appx 2 weeks and then #8 misfire code again. Even after I swapped #4 & #8, getting #8 misfire? I'm puzzled. It's running very badly. The spark plugs were not fouled or oil covered either time. I do not know what to do next!
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