Originally Posted by Elfman
It looks like the plug wires came off the clips i had them on and rested 3 of them against the headers and they started arching out. Also when i pulled out all my spark plugs to check them, 2 were loose? :/ what could have caused them to back themselves out? (They were all torqued the same)
Sometimes they just come loose, that's why you should check them periodically.
It can also be caused by using a plug with the wrong type of seat.
Example: Using a gasketed seat plug in a head designed for angled seat plugs.