2000 Pontiac Grand Prix M Having Random Misfire Onli Engine Gets Warm Car Cold

2000 PONTIAC GRAND PRIX
127 MILES
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I'm having a random misfire onli when engine gets warm when car is cold it runs like a champ with no misfire Wat so ever when car get warm it starts to misfire under load only tried coils new and plugs I hav some nice msd wires so I left them on u think that can be the problem the wires?
Mar 19, 2013 at 11:29 AM
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