Conquering P0304 Code Challenges A Roadmap to Successful Repair

His CEL came on with a P0304 code. He told me he feels the misfire on cold starts, but it drives fine. We replaced the cylinder 4 coil pack ... Evo Engine / Turbo / Drivetrain - Code P0304 Cylinder 4 Misfire - i changed my spark plugs a couple days ago (Denso Iridium) and i my car ... after changing them all, started my truck same code, same misfiring at low idle. went back to the place of tune up to have them recheck the ... 2017 Edge Ti 2.0L shows P0304. The spark plugs were changed and I swapped ignition coil 4 to 1 spot. The code was cleared and 2 days later ... Compression test is a must at this minute. If compression is low, check valves. If compression is ok- injector, coil, spark plug, wiring is to blame. Initial possibilities off the top of my head: Bad coil pack, Bad spark plug, Bad injector. If it is under warranty have it towed to the dealer. The code was P0304 Cylinder Misfire. I had the van in for a regular oil change and told them that the light was coming and going, but it wasn't on at the time ... Just did some diagnostics with Vida and I appear to have no fault codes but misfire counter showed multiple misfires across all cylinders and ... A friendly local garage pulled codes, P0302 and P0304, cylinder misfires. We erased. Switched plug wires around to assess. Ran for check engine light, and ... It was pulling a P0304 - Misfire occuring in Cylinder 4. I pulled the plug and wire in #4. The plug is gapped at .035 which is to the spec in the FSM and the ...