thtguy

Ok everyone. every 6-8 month, I get a missfire CEL, pull the plugs and they have a heavy, hard, shiny black carbon buildup, on both plugs in cyl-6. I am guessing this is probably my valve seals, on that cyl. I am at 170K miles, uses about a quart every 1500-2000 miles, and I think some of that is coming from the rear main leaking. just wanted to see what everyone else thought.

pics of plugs, one cleaned of carbon the other with it still intact.