pinging - detonation ?

[95mustanggt]

Originally posted by sfedenia:
...what is a hotspot?

A hotpot is when either some material (metal) or a surface of the combustion chamber becomes very hot. This "hotspot" then causes the fuel-air mixture to detonate prematurely causing detonation and knock.

I'm not sure that this is your problem though. It will happen when you are opperating the engine for a long period of time creating a lot of heat. Depends on when your detonation occurs. Now that I think about it, unless it only does it when your engine is very hot it's something else.

Does this make sense? I'm lost...