by skidaddle » Wed Aug 16, 2017 9:13 pm
Since I bought the 07 liberty gt it had a broken clip on cylinder 4 plug to coil. Maybe once every few months I'd get a P304 (cylinder 4 misfire) code so I'd crawl under, pop it back on, all good. It started getting worse so now I've replaced the plug, and it's doing it every 20 minutes! Swapped coils, changed plugs, problem still there. Still plenty of power but runs rough on idle. Next I'm considering swapping injectors and getting some upper engine cleaner. Hoping it's not the loom or ECU. Also assuming I put the 3 pins back in the correct location for the plug. As I'm sure it wouldn't run at all if it is wrong. Anyone have a wire diagram or any other ideas? Thanks