02-23-2013, 10:16 PM
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Sailfish
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Join Date: Jun 2011
Location: broussard,La
Posts: 4,526
Cash: 5,646
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Quote:
Originally Posted by southern151
The arc begins to fire to the outside of the plug. You'll see a little grey streak down the outside of the plug. It's arcing to the head instead of to the internal of the plug. If you replace only the plug, the path is already burned into the wire. If you replace only the wire, that grey mark down the side of the plug is metallic and, the path of least resistance. In short, when you pop the plug wire, it interrupts the path. Also, always replace both components during regular maintenance.
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Excellent advice!!! 
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