suprbst
NAXJA Forum User
- Location
- Yuba City, CA
My brother & I just installed a new head on my 2000 XJ after the 0331 head cracked. We used all new gaskets, etc, including new injector seals & new spark plugs. After it warms up, now, it starts to run a little rough & then throws a CEL. I checked it with an OBD2 monitor, and it's P0301 - cylinder 1 misfire. I tried swapping the 1 & 2 plugs (plugs look fine) and the misfire still occurred in the same cylinder. I tried swapping the injectors for 1 & 2, and still the misfire stays @ cylinder 1. So do I start changing out sensors, like the crankshaft position sensor or the camshaft position sensor, or could it be the coil pack (it's the single-piece unit with 3 coils)? I have the FSM, and I've started following the test procedures for the injectors, but I'm not sure about testing the coil pack. Any suggestions? Does anyone in Sac/Yuba City have a compatible coil pack I can swap in to test if this is the source of the problem?