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Thread: Getting Scanner to read Lambda

  1. #1
    New Member
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    Dec 2007
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    7

    Default Getting Scanner to read Lambda

    Hey guys. My brain hurts a little and need help. I have a feeling I am just overlooking something. I want to view my LM-2 as lambda on the scanner. It is going into my Ext.1 and is working properly when I choose WB02-LC11. I just cant seem to figure out the custom PID portion of everything. I want to log in lambda because now that I changed Stoich AFR in the tune to 14.27 for the wonderful E10 we have, now my BEN factor is way off cause commanded AFR is 14.27 which = 1 lambda. I am a fan of tuning with lambda vs AFR.

    And then my next question, this system will only show me Commanded EQ or Commanded AFR, no Commanded Lambda. So what do I need to do, or what formula/custom PID do I need to convert either the commanded AFR or the commanded EQ over to lambda so I can use a BEN Factor for tuning.

    this is a 05 5.3l

    Any help would be greatly appreciated! Thanks Guys

  2. #2
    Lifetime Member darcy's Avatar
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    Feb 2012
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    Default

    How is your LM-2 hooked up? I presume via serial, since you refer to EXT.

    In this case, log Commanded EQRatio (GM.EQRATIO) and Wideband Lambda (EXT.W02LAM1), then use the BEN factor CALC.W02BEN.

  3. #3

  4. #4
    Joe (Moderator) joecar's Avatar
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    Apr 2003
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    Default

    Serial comms from wideband would allow you to log in Lambda.

    PCM commands in EQR.

    Both are independent of stoich AFR.



    ( to run correctly, you would still need to set B3601 to the stoich of the fuel you're running )

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