2001 Cadillac Deville MISFIRE

[quote:d85e43473d="bigec4000"]Engine Performance problem
2001 Cadillac Deville V8 Two Wheel Drive Automatic 56000 miles

I CHANGED SPARK PLUGS IN MY CAR AND WENT WITH PLATINUM (BOSCH) AND STARTED CAR UP AND IT STARTED TAPPING LOUD. THINKING THAT THESE ARE NOT THE SPECIFIED PLUGS I TOOK THEM ALL BACK OUT AND REGAPPED THE OLD SPARK PLUGS. REINSTALLED THEM. CLEARED THE CODE THAT CAME UP.A DAY LATER I GET A CODE THAT SAYS I HAVE A MISFIRE IN CYLINDER 2. WHILE AT IDLE IT VIBRATES SLIGHTLY. WHAT IS THIS MISFIRE AND HOW CAN I FIX THIS?[/quote:d85e43473d]

Hello,

Try switching the #2 plug with another one if misfire moves to that cylinder replace plus with O.E or O.E Equivelant.

If still in same cylinder try switch the plug wire if moves replace wires.

Post Finding....



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