jeep tj 2005

Hey everyone, figured I’d finally start a build thread to track the progress (and probably ask for advice along the way). I've been going through vehicles like crazy in the past 1.5 years (two 87 YJ's one with a CARB legal V8 swap and a Suzuki Samurai that was built to the point of not being...

I have a 2005 Wrangler LJ with the 4.0. I have been getting a CEL for P0300, P0303, P0304 and P0431 randomly. Each time I reset the codes they randomly come back. I wasn't really worried because it was running fine. It started to have a slightly irregular idle so I replaced the spark plugs with...