...thank you for the reply. So the carbon deposits act as mini-glow plugs or spark plugs, when they get heated enough, they ignite. That makes sense.
I think he should look into the timing issue. His car is very well maintained and the pinging developed very suddenly.
I like Chevys too. Nice cars. Back in high school my brother and I restored a 57 Chevy to car show conditions. It was a real fun project.
Thanks for the info.
1989 300TE "Alice"
1990 300CE "Sam Spade"
1991 300CE "Beowulf" RIP (06.1991 - 10.10.2007)
1998 E320 "Orson"
2002 C320 Wagon "Molly Fox"
Res non semper sunt quae esse videntur
Not in this weather!