why do i have black rings around my spark plugs??
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Joined: Aug 2003
Posts: 1,061
From: southern IL
why do i have black rings around my spark plugs??
I have black rings all the way around all 8 of my spark plugs..What is causing this? they are about an 8th inch think and werent there when i put them in about four months ago.
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Darth_tsunami
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Sep 18, 2015 01:57 AM