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Here is one of the first logs I made after converting to the 7427 PCM.... I was reviewing this log in TP and I just noticed that some areas in the high KPA range have spark advance values in the history tables that cannot be correct... 23,000 degrees advance!! What is going on there?
The second and later log I uploaded did not have this issue? What is going on?
I think you had an "error" in the data stream. Every once in awhile, I'll see a very large "error" in the data log. I think it's electrical "noise" that will cause a very large "error" in the data log.
dave w
Yup, some times you got to ignore the data. Or look for the spark plug wire zapping the data! :laugh:
The ones you see at top right of spark advance history table I have seen before, they happen when motor stalls or near stall.
Ok thanks guys, you confirmed my suspicion
Did your engines start 10 seconds befroe your turned it on? LOL.
It's definately impossible, your engine would run crappy for a whole 10 seconds at 600rpm to get that advance!
I know 23,000 degrees spark advance is not actual. Was just wanting to see if others thought it was bad data for spark causing that.