Quote:
Originally Posted by mikalem
Wondering if on a reset/flash the car starts in coarse correction mode? Perhaps that would explain what I see.... I have to read more to understand for sure.
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the modes of knock control switch so fast as to seem that they're all active at once, when in reality only one ever is. fbkc is the standard operating mode. once you see knock multiple times in the same flkc cell, negative values are written into flkc. if the value is negative enough, it enters coarse correction and drops the iam. once this has happened, it's possible for flkc to go positive, which can bring the iam back up. all the while, it's spending the majority of it's time in plain old fbkc mode, just reacting instantaneously to knock events.
so, moral of the story is that it doesn't stay in one mode for long (meaning milliseconds at a time), except fbkc where there is no knock present. it is possible that the threshold to enter flkc (the first step to coarse correction) is lower during warmup phase or immediately after a flash, but i've never recorded any data that could confirm that (of course i've never tried, either).