Quote Originally Posted by steveo View Post
i just ran your log through trimalyzer's knock mapper...

do you feel that log is a fair representation of the symptoms you're experiencing? (did you actually take it during a knock event?)

the events seem localized to ~2000rpm and ~60 map. your timing advance in that cell is 'bout 35 degrees. stock f-body timing table is 38. this leads me to believe you haven't really tried to correct for the knock in the region it's happening..

if it is truly spark knock, and that log is a good one, why don't you dump some timing in that region?

if you determine that it's false knock, you could simply disable knock detection in that 60-70 kpa range after removing a few extra degrees of timing to be safe.

see attached.
Thanks Steveo. I am 100% certain that log is a good one and it was taken during a knock event. It always happens in the same range of throttle/load/RPM, so that map looks accurate too. I am certain it isn't false knock - its loud and sounds like it had a tank of bad fuel.