Hello! I have a 97 Ford F150 4.6L V8 engine truck displaying code P0302 for a cylinder 2 misfire. I have already replaced the spark plugs, so I am assuming it is not that. I noticed in the Freeze Frame that the code occurred at 66mph. I was curious what you think my next step should be, replace the coils, check for a leak, check fuel injectors? Any help is appreciated!
misfire is on our Frequently Asked Questions (FAQ) page. First topic in the list.
97 should only have 2 coil packs so it would be unlikely (but not impossible) for only 1/4 of the pack to go bad. I would check the wires running from the pack to the sparkplugs for any kind of cracks or burn marks. If you can't find anything, at night (or sometime when it is dark) spray a fine mist of water on the wires/coils with the engine running. If you get a lightshow (small arching across the wires/coils) replace what was sparking.
