Changed the plugs wires and ignition coil..check engine light blinks and then stays on, ran the obd and reads p0304n pending the same code ...been reading bout misfireing in #4 ? Could it be the head gasket n how would I change this ..anyone know???????
Yup. Probably the headgasket. If you're not familiar with working on engines it is probably a job better left to a professional. There's videos on YouTube showing how but they take a lot more apart than necessary because they plan on having the head rebuilt. I did mine myself (I was a dealer tech for many years) and it took about 8 hours doing it in my driveway. Where are you located?