Car runs great first twenty or so minutes. Temperature is in middle well before issues start. Then the car slowly starts to have a misfire, then minutes later with what appears to be raw fuel igniting inside the catalytic converter. Then car has hard time idling afterwards. No overheating temp gauge stays the same at all times no check engine light. after misfiring the car will not idle without playing with the throttle

I'm thinking computer or coil pack ??? but no money to just buy parts and throw at it.


3.3 liter motor