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Have a 97 tj with just over 23700 miles the other day my computer threw a 304 code for the cylinder 4 misfire the plugs wires cap and rotor plus the coil are all new what could be my problem or problems atvthis point thank u

Hi my names craig i have a 97 wrangler with the 4.0 i6 engine with auto transmission i have a check engine code of p304 for cylinder 4 missfire and a code for my o2 sensor in bank one reading to lean how can i fix my missfire it has new plugs wires cap rotor and coil and has just over 237000 miles