I recently rebuilt a 351w - it is completely stock except for a mild cam. While going through the flat-tappet cam break-in, I noticed a miss above 1500 rpm. I inspected the plugs and #4 was fouled (wet), all others were fine. I swapped plugs and then wires and there was no change. I did a compression test, and all cylinders were 150+/_5. I ran a borescope into the bore, and noticed both radial and vertical scoring on #4, all other cylinders were okay. It looks like possible oil starvation. What do you think?
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Nov 18, 2024 at 3:17 AM
