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Thread: LT1 $EE cross counts not matching

  1. #1
    Fuel Injected! Terminal_Crazy's Avatar
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    LT1 $EE cross counts not matching

    Good evening gentlemen,
    Another oddity to discuss please.

    Does anyone else see or have discrepancies in the no of cross counts when logging?
    I have 1 bank that always gets 50%-100% more crosscounts than the other.
    Is this common or normal?

    It isnít lazy O2ís either.

    Is more cross counts better?


    Thanks
    Mitch
    '95 Z28 M6 -Just the odd mod.
    '80 350 A3 C3 Corvette - recent addition.

  2. #2
    Fuel Injected! steveo's Avatar
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    a cross count is just a switch from low to high.. if you have no cross counts it means you've never gone from low to high so your o2 is probably dead.. (or there's a bug in whatever is calculating your cross counts; as $EE doesn't calculate them itself)

  3. #3
    Fuel Injected! steveo's Avatar
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    oh i misread. i'd say if your cross counts are that far off with a larger log, you have one o2 (or its fueling) behaving differently than another in some way. if both banks were truly equal the cross counts should be close. for a smaller log all bets are off.

    yes more cross counts are better, a tight closed loop with good base fueling map should switch like mad especially during cruising without big throttle changes

  4. #4
    Fuel Injected! steveo's Avatar
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    oh and also remember that the loop interval that measures o2 voltage is much, much shorter than the datastream speed of $EE so it'll always miss an arbitrary number of cross count events.

  5. #5
    Fuel Injected! Terminal_Crazy's Avatar
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    Cheers Steveo, just wanted a sanity check.
    Just been out for a good hour 40+ mile cruise.

    Quote Originally Posted by steveo View Post
    if both banks were truly equal the cross counts should be close. for a smaller log all bets are off.
    Cross counts are certainly much closer - 4150 to 4700 but always higher on the rhs.
    RHS O2 has always logged a slightly lower voltage until CL.
    It's had 3 sets of O2's on so deffo not O2 issue in itself, it just leans out faster than the left.

    Quote Originally Posted by steveo View Post
    yes more cross counts are better, a tight closed loop with good base fueling map should switch like mad especially during cruising without big throttle changes
    I'll start having a play with some O2 settings.

    Quote Originally Posted by steveo View Post
    oh and also remember that the loop interval that measures o2 voltage is much, much shorter than the datastream speed of $EE so it'll always miss an arbitrary number of cross count events.
    Yep, I'd still expect them to average out similar though.


    Thanks
    Mitch
    '95 Z28 M6 -Just the odd mod.
    '80 350 A3 C3 Corvette - recent addition.

  6. #6
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    How hard is it to swap O2 sensors from side to side?

  7. #7
    Fuel Injected! Terminal_Crazy's Avatar
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    It's had 3 maybe 4 sets in.
    They've been swapped previously.
    Doesn't make any difference.

    Thanks
    Mitch
    '95 Z28 M6 -Just the odd mod.
    '80 350 A3 C3 Corvette - recent addition.

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