4.0 OHV eating spark plugs?
Got a question. What would cause my engine to go through spark plugs like candy? Its a 4.0L OHV with 110k miles on it, and I don't beat the truck, but it seems like every 4 months the plug in cylinder 4 begins to misfire, and when I take the plug out, I find the insulator cracked, broken, or completely gone. I've changed the plugs out 4 times in the past year, it's getting annoying and worrisome. Could there be something in cylinder 4, or what else could be wrong?