Anyone else experiencing "pinging" with a Turner/Jim C chip? My car occasionally pings and at the same time burps out some smoke which is pretty frightening to me. It seems to be random too, doesn't do it every time or consistently on a certain brand of gas and I always run 92 or 93 octane, usually Amoco or Phillips 66. The car has 105 K on it, valves in spec, recent plug wires, cap/rotor and plugs. I really enjoy the extra power and smoothness but not willing to sacrifice and engine for it.