I have a 2204 Jeep Wrangler TJ Sport 4.0 liter never had any major issues with it in the past 8 years I've owned the jeep. We had a cold front come through and I had to replace my water pump, heater core, and radiator. Ever since the engine has been idling and running rough and I have been getting a P0303 code for a misfire on cylinder #3. So far I have checked the coil rail changed the spark plugs, cleanded the throttle body, seafoamed the engine, cleaned / tested all the fuel injectors "#3 injector was swapped with #1", and insulated the fuel rail and the fuel injectors.
After all that nothing has changed. I am thinking it might be the head gasket but not sure. Any other ideas?
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After all that nothing has changed. I am thinking it might be the head gasket but not sure. Any other ideas?
Sent from my iPad using Tapatalk