After having detonation in cyl4 (13* KR) and bending a spark plug, I have changed my plug and wire, swapped injectors and coil packs and I still have a misfire on cyl4. I have a tapping coming from the top end that goes away once the engine is warm too. I have ordered new lifters and will probably do a compression test Sunday or Monday. I am thinking bent push rod, ****ed up lifter arm, or chipped piston. It idles fine and only starts to miss under load.
Lets discuss. I have searched the forum for chipped piston symptoms, its how I came to this idea
