gadaddy
New Member
Doing some work on the jeep today and really screwed something up. Changed passenger side valve cover gasket - changed coolant and thermostat - got it all back together and got a flashing check engine light. Runs like crap. Says p0300 p0302 p0303. I degreased and sprayed a good bit of water on it. Belts were squealing. What have I done to it? I know these are misfire codes but don't understand why. :emotions122: