p0306

I bought a fuel pump from dead jeep a while back and after a few months I needed to prime the pump to get her to start. Figured the regulator was going out. Dropped the tank and replaced the regulator only. Also changed spark plugs they were showing discoloration on one side and had some bluing...

First post here, So my 98 jeep tj 4.0 with 167k miles auto trans threw a check engine light at me yesterday. I read the codes and it came up with 0300 0306 and 0138. 3 days ago I changed both upstream and downstream 02 sensors, removed and cleaned throttle body and cleaned IAC. The Jeep was...

Hello all. I am new to TJ (and Jeep) forums so I hope I'm posting in the right place. I recently had P0306 engine code (later found out one hot morning while firing up the Jeep. Check engine was flashing. I drove approximately 3 miles to have the code read (P0306). I then drove another...

2006 Jeep Wrangler X 4.0 6-speed I have the dreaded misfire. The weird thing is it will occasionally go away and then come back. I can tell when it's going to come back because it gets noticeably rougher. I have tried changing out spark plugs, changed the ignition pack, new 4-hole Bosch fuel...

I recently got my 2006 LJ back on the road. Of course it failed inspection. Had cracked front and rear manifolds - replaced. I then started getting the code for 6th Cylinder Misfire. The plugs and coil have been replaced and the fuel system was cleaned. Still getting the code. The...