Mechanics

COIL PACKS

2002 GMC C2500 • 115,000 miles

I have gmc 02 2500 6.0, I had random misfires p300, hooked up to computer and found 5 and 6 cyl as culprit, I replaced coil packs and then looked for any arcing at night, found 3, 4, 5, 6, coils arcing arond the coils. Two in which are new.I have new wires and running champion iridium plugs at 40 gap, truck runs much better but the arcing is alarming me. Is this normal on those models or is there a fix?
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Waterboy187
May 6, 2013.




No, not normal. Check all connections. Iridium plugs? Are they what is called for? It may be the issue

Roy



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