misfire on 2002 Pontiac Grand Am

misfire; catalitic converter got hot; trac off light on? service engine soon light blinking.
checked: plugs replaced
catalic converter removed
no change

Asked by for the 2002 Pontiac Grand Am
You'll need to determine the cause of teh misfire. See this article for more information: http://repairpal.com/OBD-Code-P0300
1 answer