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Prior to the damage, what have past plug readings had to say about the mixture? Do they look leaner than the others? Does the ECU you are using have individual cylinder fuel trims?


This was a fresh engine and we never had put boost in it before so we don't really have any prior plug readings to go off of. Interestingly enough, after the dyno pull that hurt the engine I pulled the plugs and the plug for number 8 was the best looking plug of all. It was burning clean and showed no signs of detonation or damage. Very strange indeed considering that piston is totally trashed. I know it doesn't seem to add up... but it's a fact.

Yes, my ECU has individual cylinder trims but I was not using that feature. I will be in the future.

Last edited by blownEFI; 06/06/12 01:12 AM.
"These go to eleven", Nigel Tufnel