I’m trying to fix my son’s jeep. Giving me a tough time. This forum was super helpful with my XJ years ago. Now I have another and it’s a project.
Drove good for 6 months. Now, it’s throwing the following codes:
P0351
P0300
P0301
P0306
I know cylinder 1 and 6 share the same pulse. Replaced the coil pack and spark plugs with NGK. No change.
Potentially unrelated. He was having heat soak issue. Restart when hot was causing cylinder 3 misfire. Sluggish start then cleared up.
I verified continuity between pin 7 at the PCM and the connector to the coil pack. Wires don’t appear to be issue. Even jiggled around and kept continuity.
Fuel pressure around 50psi.
Took coil pack off again and checked for spark. Had spark on 1 and 6. Used test light.
Compression test between 165 and 172 on each cylinder. No coolant in oil and coolant still looks good. Popped off valve cover to replace gasket and didn’t see anything of note.
I’m stumped. Any ideas?
When I cleared codes after putting everting back together, it ran well for a couple miles or so until I gave it the beans. Didn’t like that. Started misfiring again. Same codes.
Drove good for 6 months. Now, it’s throwing the following codes:
P0351
P0300
P0301
P0306
I know cylinder 1 and 6 share the same pulse. Replaced the coil pack and spark plugs with NGK. No change.
Potentially unrelated. He was having heat soak issue. Restart when hot was causing cylinder 3 misfire. Sluggish start then cleared up.
I verified continuity between pin 7 at the PCM and the connector to the coil pack. Wires don’t appear to be issue. Even jiggled around and kept continuity.
Fuel pressure around 50psi.
Took coil pack off again and checked for spark. Had spark on 1 and 6. Used test light.
Compression test between 165 and 172 on each cylinder. No coolant in oil and coolant still looks good. Popped off valve cover to replace gasket and didn’t see anything of note.
I’m stumped. Any ideas?
When I cleared codes after putting everting back together, it ran well for a couple miles or so until I gave it the beans. Didn’t like that. Started misfiring again. Same codes.