Spark Plug Problem
#1
Spark Plug Problem
My 2000 Explorer 4.0 OHV. I have a problem where the #3 cylinder spark plug goes bad it gets a hairline crack i think in the porcelin or goes bad internally. This happens every couple weeks. I change this plug only and the truck runs fine. Any ideas out there what the problem could be? I was thinking maybe the coil?
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