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Thread: VATS issue - 3800 L27 to L67 - $5B4 $5B5

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  1. #1
    RIP EagleMark's Avatar
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    Turn off VATS!

    There's probably a high and low VATS frequency in the bin, but since it's not in the mask/xdf you have no way to know where to change it.

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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  2. #2
    Electronic Ignition!
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    I unchecked VATS on the L67 bin and it STILL failed on VATS . How can I be certain what def to use for the L27 and the L67?

  3. #3
    Electronic Ignition!
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    AXAZ the L27 Prom looks to be in $5B5

    BCFN looks to be in $5B4

  4. #4
    Electronic Ignition!
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    Would it be at all possible that I'd have to disable the VATS flag in the BCFN using $5B4 AND $5B5 xdf? They have their VATS enable in a different location on the bin. Could the PCM be checking both locations?

  5. #5
    Electronic Ignition!
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    BCFN is NOT in $5B4 as listed on here - the TCC vs Spark and MAT tables are all messed up.

  6. #6
    RIP EagleMark's Avatar
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    There's more then that messed up in the XDF, some of the parameters address are off the chip?

    There's always been some controversy over all the $5B XDF/masks and extra number on end. Since none of the one's I've seen have been signed and we don't have a hack for them I find them all questionable.

    I think John at TunerCat is the only one who knows what they really are and are his designations? If it were a car I needed to tune I'd buy the correct mask from TunerCat.

    BCFN was also superseded to BDHN which we do not have?

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

  7. #7
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    want to post the unmodified BCFN BIN? it's not one i've had before.
    1995 Chevrolet Monte Carlo LS 3100 + 4T60E


  8. #8
    Electronic Ignition!
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    BCFN is attached. This was read directly from the Memcal.

    Is there anyway I can check where the VATS flag should address too? Really all I need to do is turn VATS off. I would guess that the current $5B4 xdf may have the VATS address wrong.
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