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When I start engine is when misfire accrues after engine warms up I turn off engine then restart it and engine runs smooth I first get engine code p0300 then it breaks it down to po301 po306 and few other cylinder numbers I believe it is is the individual spark plug coils

Vehicle: 2003 jeep 3.7 liberty

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P0300 Random misfire

The only way to find out is to remove the individaul coilhave , the suspected coil move to cylinder that has not coded a misfire,you will also need to inspect for water intrusion in the sparkplug well and also check the sparkplug boot for carbon tracking that indicates secondary ignition leakage

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