blawrence
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I have been reading back to 2006 forum when members had issues with plugs not firing. My #4 stopped firing yesterday and I have checked plug wires and possible wire grounding. I am running petronix ignition with an MSD coil and Magnecor KV85 leads. My plugs are Champion RN9PYP, also states 7415 on plugs. Plug gaps are .035". When I remove #4 plug and rest on engine, it sparks OK and strobe light shows it is firing, but in the cylinder strobe light shows erratic or no spark. Has my MSD voltage damaged this plug? What is a better plug solution, please?
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