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Blackened300a
10-10-2009, 05:08 PM
Remember to check your spark plugs!!!!!!!!

Here's my souvenirs from my drive up to Indiana


One melted coil from the lightning bolt that went off in the cam cover.
http://i32.photobucket.com/albums/d12/blackened300a/a08ec46f.jpg
http://i32.photobucket.com/albums/d12/blackened300a/963e0cfa.jpg

This is the coil connector that is permanently shaped as a "S" due to the heat. This was black when I pulled it out. There is also a metal ring that went around the connector. That ring melted and oozed out the coil cover. That was how I knew where to look when the miss started.
http://i32.photobucket.com/albums/d12/blackened300a/20629707.jpg

This is what's left of the rubber boot.
http://i32.photobucket.com/albums/d12/blackened300a/192274dd.jpg
http://i32.photobucket.com/albums/d12/blackened300a/c4b358d5.jpg

Here's my plug which backed out and seemed to bounce a bit in the hole and damaged the threads.
http://i32.photobucket.com/albums/d12/blackened300a/39f5d1a1.jpg
http://i32.photobucket.com/albums/d12/blackened300a/bc6baa29.jpg

Conclusion, The plug backed out and was just sitting above the hole, but thanks to the rigid coil connector, it was held down to fire the cylinder enough that I didn't notice a miss. After a while the connector started to bend due to the plug pushing it upward and it rubbed a hole through the boot and arced against the cam cover wall.
BTW, The thread's in the head were fine, I was able to thread a new plug without any hassle so I consider myself extremely lucky! I replaced the coil and haven't had any issues the entire 700 mile drive home.

MAKE SURE YOUR PLUG'S ARE TIGHT!!!!!

SpartaPerformance
10-10-2009, 05:18 PM
I've seen that in a few 4.6L, mostly F-150's. Of course it would happen to you on such a long trip.... You playing Lotto is a waste of money. :P

RacerX
10-10-2009, 05:34 PM
Aren't you supposed to screw plugs in??? :D
I'm glad nothing's wrong! :coolman:

FordNut
10-10-2009, 06:13 PM
Did you re-use the coil wire to the plug? I believe that one is a GMS wire.

Blackened300a
10-10-2009, 06:26 PM
Did you re-use the coil wire to the plug? I believe that one is a GMS wire.

I couldn't because of the bend, I ended up buying a new coil and have 7 GMS connectors and 1 OEM connector.

Ms. Denmark
10-10-2009, 07:33 PM
Wow Paul, those pics are something! Just glad you guys made it to Indy! Thanks for the education and the reminder. ;)

FW_Linc/Merc
10-10-2009, 07:48 PM
Very glad to here you head is not all screwed up. Would hated to have to recommend a shrink. Glad to here you made it home safe.