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Thread: Calc.MAFT: correcting VE and calculating MAF (in single log) --> reverse of Calc.VET

  1. #71
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by CHEVYHD496 View Post
    Ok, please go easy on me as I'm new to this! When you say "disable maf", how do I disable it? Then I do not have a WBO2, so can I then still use this setup to tune? Thanks!
    Disable the MAF by causing a MAF DTC to immediately show up...

    this can be done in any one of these ways:
    - unplug MAF if you have 3-wire connector (i.e. IAT is on separate connector).
    - edit C2901-3 to force MAF to fail.

    You may have to edit C6001 to cause P0101-3 to trigger on 1-Trip.

    If you don't have a wideband then you will only be able to correct VE for Closed Loop, i.e. low/light throttle only.

    ~ posted by phone ~

  2. #72
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    Can this be done without a wideband O2 sensor?

  3. #73
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by oreobadr View Post
    Can this be done without a wideband O2 sensor?
    Without a wideband, you can do only CL (meaning light throttle), so you won't be able to reach high into the upper MAF table and upper VE table.

  4. #74
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    Quote Originally Posted by WeathermanShawn View Post
    In-Memory-of-Shawn-Sankey
    5. Paste-with-labels the new CALC.MAFT map into Table B5001 in your tune file:

    ( ignore this step if you're running SD, i.e. ignoring MAF and doing VE table only )



    (to limit the cell display width to something sensible, in the map properties goto the Cell tab and look at Constrain Cell Size)
    Can't find a CALC.MAFT map. What is the data in the Value column above?

  5. #75
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by voda1 View Post
    Can't find a CALC.MAFT map.
    see attached zips for maps.

    What is the data in the Value column above?
    For the MAF map, the Column pid can be any pid you logged... for convenience I make it GM.MAFFREQ (same as the Row pid).
    Attached Files Attached Files

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