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Thread: Cannot get wideband logging correctly with V1 analog...plx sm-afr

  1. #1
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    Default Cannot get wideband logging correctly with V1 analog...plx sm-afr ***SOLVED***

    Hi all, finally got a chance to get my wideband installed and it is working via the digital display.

    i took the 0-5v WBoutput from the sm-afr box to the orange connector and ran the ground from the sm-afr to the orange connector.

    question 1) does the ground also have to go to a chassis ground?

    i started logging some data and my external analog voltage doesn't fluctuate, just sticks at 3.4v

    the afr on efilive hovers around 16.8ish and doesn't change even with throttle, the display gauge though changes accordingly

    this is a copy of my calc_pids file...

    *CLC-00-032
    factor 0 1 .0 "{GM.EQIVRATIO}=1"

    *CLC-00-054
    C 0.0 200.0 0.1 "{SAE.IAT.C}+(({SAE.ECT.C}-{SAE.IAT.C})*lookup({SAE.MAF.gps}, 0.0,0.799805, 10.0,0.419922, 20.0,0.282715, 30.0,0.243652, 40.0,0.219727, 50.0,0.202637, 60.0,0.188477, 70.0,0.175781, 80.0,0.164551, 90.0,0.153809, 100.0,0.143555, 110.0,0.134277, 120.0,0.124512, 130.0,0.115234, 140.0,0.106445,150.0,0.089844))"

    *CLC-00-110
    factor 0.5 1.5 .4 "{GM.EQIVRATIO}*({CALC.AFR_PLX1}/14.7)"

    *CLC-00-120
    factor 0.5 1.5 .4 "({SAE.LONGFT1}+{SAE.LONGFT2})/200+1"

    *CLC-00-220
    factor 0.5 1.5 .4 "iff({CALC.CL}, {CALC.LTFTBEN}, {CALC.WO2BEN})"

    *CLC-00-300
    % 0.0 100.0 .2 "{SAE.MAF.gps}*({CALC.DYNAIRTMP.C}+273.15)/{SAE.RPM}/{SAE.MAP.kPa}*3445.2/displacement()"
    VE 0.0 2.468 .4 "{SAE.MAF.gps}*({CALC.DYNAIRTMP.C}+273.15)/{SAE.RPM}/{SAE.MAP.kPa}*15"

    *CLC-00-320
    % 0.0 100.0 .2 "{CALC.SELBEN}*{CALC.VEN.%}"
    VE 0.0 2.468 .4 "{CALC.SELBEN}*{CALC.VEN.VE}"


    # ================================================== ============================
    *PRN - Parameter Reference Numbers
    # --------------------------------
    # See sae_generic.txt for more information on the *PRN section
    #
    #Code PRN SLOT Units System Description
    #------------------------- ---- ------------ ---------------- ---------------- ------------------------------------------

    CALC.CL F032 CLC-00-032 factor Tuning "Closed Loop (based on EQIVRATIO)"

    CALC.DYNAIRTMP F054 CLC-00-054 "C" Temperature "Calculated Dynamic Air Temp"

    CALC.WO2BEN F110 CLC-00-110 factor Tuning "BEN from Plx WB"
    CALC.LTFTBEN F120 CLC-00-120 factor Tuning "BEN from LTFT"
    CALC.SELBEN F220 CLC-00-220 factor Tuning "BEN selected from WB or LTFT"

    CALC.VEN F300 CLC-00-300 "%,VE" Tuning "Calculated VE, Not corrected"
    CALC.VET F320 CLC-00-320 "%,VE" Tuning "Calculated VE, BEN corrected"





    i am using v1, on a ls1a ecm.

    any ideas as to what the problem could be?
    Last edited by Crunkmaro; November 16th, 2011 at 03:17 AM.
    94 TransAm: LS1/a4 swap...98 OS. 237/242 603/609 cam (MS3). 3600 Converter, 2.73 gears. Full Exhaust
    98 Camaro: twin 61s (in progress)...

  2. #2
    Joe (Moderator) joecar's Avatar
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    Which two pins on the orange connector: C and D, or E and D...?

  3. #3

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    See attached re - Joe's post above

    Click image for larger version. 

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  4. #4
    Joe (Moderator) joecar's Avatar
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    Depending on whether you use pin E or pin C, the voltage pid will be different (EXT.AD1 vs EXT.AD2).

    And you have to use pin D as shown in vxchev's pic (thank's vxchev).

  5. #5
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    i am using pin C for the 0-5V output from the WB controller
    I am using pin D for the ground output from the WB conitroller.

    i am using ext.ad1 as the voltage pid


    i added those pids into my calc_vet selection...is that correct? i thought the only pids i needed to use were the ones noted in the tutorial. i think i am overlooking something very major lol
    94 TransAm: LS1/a4 swap...98 OS. 237/242 603/609 cam (MS3). 3600 Converter, 2.73 gears. Full Exhaust
    98 Camaro: twin 61s (in progress)...

  6. #6
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    aw crap it should be ad2.i'll give that a shot and update!


    do i need to add the ext.ad2 PID and the calc_afr_PLX2 pids to my calc_vet selectioN?
    94 TransAm: LS1/a4 swap...98 OS. 237/242 603/609 cam (MS3). 3600 Converter, 2.73 gears. Full Exhaust
    98 Camaro: twin 61s (in progress)...

  7. #7
    Joe (Moderator) joecar's Avatar
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    In your calc_pids.txt change this to use AFR_PLX2

    Code:
    *CLC-00-110
    factor             0.5           1.5       .4  "{GM.EQIVRATIO}*({CALC.AFR_PLX1}/14.7)"

  8. #8
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    okay i changed the calc.afr_plx1 to calc.arf_plx2

    also added ext.ad2 and calc.afr_plx2 to my calc_vet.pid file so it looks like this...






    do i need all those pids? the calcvet tutorial doesnt mention adding extad2 or calcafrplx2
    94 TransAm: LS1/a4 swap...98 OS. 237/242 603/609 cam (MS3). 3600 Converter, 2.73 gears. Full Exhaust
    98 Camaro: twin 61s (in progress)...

  9. #9
    Joe (Moderator) joecar's Avatar
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    You are ok, you're at 24 pid channels.

  10. #10
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    excellent. everything is logging correctly.


    now to start tuning before the snow hits!
    94 TransAm: LS1/a4 swap...98 OS. 237/242 603/609 cam (MS3). 3600 Converter, 2.73 gears. Full Exhaust
    98 Camaro: twin 61s (in progress)...

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