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misfire on 2002 Pontiac Grand Am

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
misfire; catalitic converter got hot; trac off light on? service engine soon light blinking.
checked: plugs replaced
catalic converter removed
no change
(1) Answer
You'll need to determine the cause of teh misfire. See this article for more information: http://repairpal.com/OBD-Code-P0300