Originally Posted By: MaximaGuy
Pinging is not good by any yard stick and can easily relate to it.
This doesn't appear to mean anything. What does "it" refer to?
Originally Posted By: MaximaGuy
The ping is from the coils, they are on their way out.
This appears to be tosh, assuming the OP is using "pinging" the way the term is uaually used.
"Pinging" usually refers to detonation, though I doubt I can distinguish that from pre-ignition by ear (Can't speak for the OP, of course). Coils don't / can't suffer from either.
Originally Posted By: MaximaGuy
One other thing that could cause pinging is uneven heat transfer, flush the cooling system and that dramatically reduces pings.
Just possible that this might affect pre-ignition, though doesn't seem very likely.