Recent content by kj.priamo

As @JeepKJ_Guy suggested. I'm now leaning towards possibly a clogged or leaking fuel injector since the spark plug on cylinder 4 was all covered in carbon despite the plug being a few days old.

I ended up replacing all 6 coils to see if that'd fix the problem. Still the same issue. I put back the old coils and returned the new ones but I checked the brand new spark plug in cylinder 4 I put in and it was all black covered in carbon already. The only thing I'm thinking it could be now is...

I haven’t changed my coils yet since they don’t seem to be throwing a code. Don’t want to dump money if it’s not going to fix the problem. Should I replace all 6 coils and hope for the best?

Yes I have a multimeter. I changed the spark plugs which got rid of the P0304 code but the misfire still exists. I also changed the MAP sensor as my old one was split in half (somehow) but it seemed like that did nothing to fix the problem. It’s so strange that I’m left with P0175, P0175, P0138...

Only 155k. I don't have a good OBD scanner to see live data. Do you have any suggestions?

I now have a new code which is P0175. I’m left with P0175, P0138, and P0157

I have not. I want to order the right sensors corresponding to the codes but trying to find them online is a bit confusing. Hopefully this could maybe fix the problem due to the air to fuel ratio.

Coolant level is fine. I don't have coolant leaking into the oil causing the head gasket to deteriorate nor do I have milky/white oil. I was thinking possibly fuel injectors or fuel filter, besides that the only other thing I'm thinking it could be is a bent/cracked piston :(

I own a 2004 KJ with the 3.7L and it's been running fine until a few days ago I got a P0304 code and started feeling the misfire shaking the car badly. The only other codes I had prior to this was P0157 and P0138 that I assumed was linked to some sort of exhaust leak somewhere. I changed the...