[Artofdeath]

I just want to clarify. Words have different meanings for people so here goes.

Ping as described is early detonation or ignition knock. This is usually heard when the engine is under load, going up hill with the throttle depressed. The engine under load with to much advance timing can cause the fuel air mixture will explode before the piston reaches the top of its stroke. The knock you hear is the explosion pushing the piston down while it's still traveling up. this shocks the piston and push rod back down and into the crank. The heat cause by detonation will cause hot spots in the cylinder and could cause the either the chamber wall, piston top, head or valve to melt. Severe cases can cause engine failure.

When adjusting idle mixture I usually listen for smooth idle. Set your timing then check your idle mixture, then set your idle speed.

I could be wrong in the order of those things but that is how I usually do it.

Look forward to hearing from others...