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Thread: odd knock counts

  1. #1
    Fuel Injected!
    Join Date
    Nov 2012
    Age
    62
    Posts
    90

    odd knock counts

    7747, built 350
    When ever I get a knock count it will stay at that number from then on until ignition is cycled.If I tapp on the block the count will raise and stay raised.as I am tapping on block I can watch my timing lower and rpm lower when I stop tapping it returns to normal but the knock counts stays high.

  2. #2
    RIP EagleMark's Avatar
    Join Date
    Feb 2011
    Location
    North Idaho
    Age
    63
    Posts
    10,477
    That is normal. The knock counter is an accumulater. To find where you have knock counts you need to watch data frame by frame and see where they increase. Because after they increase they stay there till next time. It will roll over at 255 and start again.

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

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