p0304

Afternoon gents, I know this topic has been discussed, and I have read through them but I have some symptoms to go along with it that I have not seen mentioned yet. As stated in the title, I am having code P0304 (cyl. 4 misfire) along with some intermittent RPM gremlins. Bear with me now as i...

Hi. New to the forum. Purchase used 2001 Wrangler SE 2,5L 5 speed. 106K miles. CEL was on but I guess I overlooked since the body and frame were solid. Issue: Very rough idle when cold. Gets a little better when warm. Auto zone CEL codes are P0303, P0132, P0304, P0138, P0455, P0303...

I fixed my speed sensor so that’s knocked off. What could be causing my cylinders to misfire. I replaced my injectors and plugs not too long ago.

Hey guys, So excited to be back in the Jeep community. Just picked up a rust-free 2000 Sport 4.0L with 161k. Big improvement from the '97 2.5L I had in high school! Well, hopefully :unsure:. It was running fine, maybe had a slightly rough idle. Took it on an hour test drive and found no...