2005 Jeep Liberty 3.7L with engine code P0300 no check engine light

Question

2005 Jeep Liberty 3.7L trouble code p0300 no check engine light. changed spark plugs still runs horrible only when cold at start up

Answer 1

P0300 Muliple misfire

Possible causes: intermittent misfires.Engine mechanical problem,ignition coil,sparkplug,Fuel pressure,Fuel injector

If this was a problem with ignition coil the problem will be constant and  will show up even at operating temperature,and the same with fuel injector, This leaves the possibility of being a low fuel pressure volume as possible and another possible is a mechanical condition dealing with the the cylinder head intake valves,