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XfireZ51 · 10-17-2019

Pull a few spark plugs and see if there are any specks of metal embedded in the ceramic (insulator) portion of the tip. If there is, that would confirm detonation.
If not, then although those cylinders may be running lean, u likely don’t have a danger of “holing” a piston.

10-17-2019	#76
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,685	Re: Ruff Idle ,Huge Loss of Power Pull a few spark plugs and see if there are any specks of metal embedded in the ceramic (insulator) portion of the tip. If there is, that would confirm detonation. If not, then although those cylinders may be running lean, u likely don’t have a danger of “holing” a piston.