Mechanics

I HAVE A SUPERCHARGE 3800 AND IT HAS A MISFIRE IN CYLINDER 4.. I REPLACED COIL PAK, NEW WIRES AND SPARK PLUGS.. WHAT CAN I DO TO CORRECT THE PROBLEM WITH MISFIRE?

1999 Buick Regal • 150,000 miles

Need help ran out of solutions.
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Need2ask
October 3, 2011.



Try compression test/vacuum test

Tiny
Fixitmr
Oct 3, 2011.