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  1. 09-22-2008 11:39 PM #1
    RedHeartbeat
    RedHeartbeat is offline WTH JUST HAPPENED?
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    Quote Originally Posted by thunder550 View Post
    When you pulled the plugs did you touch the electrode to a clean metal part like a valve cover or something? The spark plug is normally grounded to the head through the threads, so when you pull it out you need to provide another ground for it.
    The valve cover isn't a good ground, it floats completely on a bed of silicone, even the bolts holding it down have silicone or rubber isolators.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
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  2. 09-23-2008 12:03 AM #2
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    thunder550
    thunder550 is offline Senior Member
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    Quote Originally Posted by RedHeartbeat View Post
    The valve cover isn't a good ground, it floats completely on a bed of silicone, even the bolts holding it down have silicone or rubber isolators.
    Oh, DUH! I should have known that


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