What would cause this?
What would cause this? These plugs came out of my trucks original 5.3. It has 78,000 miles and runs great. It does not smoke. 7 of the plugs were clean, but #7 had all these deposits on it.
looks like #7 is lean and detonating, could be a few different things, clogged injector, dirty maf causing a lean condition, Fuel pump low pressure or clogged filter, I'd look into it asap because if the ringland isnt hurt yet it will be next to fail.
So lean and detonating would cause oily looking buildup?
Teching In
Joined: Jan 2008
Posts: 28
Likes: 0
From: Anaheim Ca
looks like it's burning a little oil and oil consumption will cause detonation, I would give your pcv system a good look over. I have seen more then a couple 5.3's that eat a little oil even under 100k.
Good times
Joe
Good times
Joe
