k i pulled my plugs today on my turbo d15 and they are like totally black around the pins....is this from running to rich or from detonation? rubs off like ash and looks like the same **** that comes out my exhaust?

 

i can't see it, but i'd say its from running rich. i can't remember if its a chilton or haynes manual, but it had pics at the back of plugs running under different conditions.

 

Running rich........for sure. Check out link: http://www.dragstuff.com/techa....html

Peace.

DAN