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Thread: Question about hooking up AEM gauge output to V2

  1. #11
    Joe (Moderator) joecar's Avatar
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    Copy the attached file to the User Configuration folder...

    start the scantool, select the pids CALC.AEM1, EXT.AD1, GM.EQIVRATIO.
    Attached Files Attached Files

  2. #12
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    Quote Originally Posted by joecar View Post
    Copy the attached file to the User Configuration folder...

    start the scantool, select the pids CALC.AEM1, EXT.AD1, GM.EQIVRATIO.
    Thanks so much I appreciate it ! I'll try this later when I get home from work.

  3. #13
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    Hope it's ok if I ask another AEM related question in this thread.
    I'l start with a short introduction about myself. Engineer in Digital Video Broadcast, but with a good understanding of electronics in general. Have recently bought my first EFI Live and are about connecting it to a 03 Silverado 1500 5.3 That I'm mounting a Edelbrock e-force supercharger to. Just finished welding a extra bunge in the kooks header for the AEM 30-4110. Can I use the calc_pids for my setup?
    This is how voltage output correlates to AFR/Lambda.







    Sent from my iPhone using Tapatalk

  4. #14
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    I am hooking up to the same gauge. I sent my V2 off to socal diesel and it got updated and now I see the ad1 voltage showing on the V2, but I can't get it to display the W02 on the V2.
    Thanks so much for any and all help guys!!!
    00 GMC,LQ4, Jarrett Faggart pistons, callies rods, Ebay studs, LS9 gaskets, 317's, KBRacing KIT, PT76/75, treadstone intercooler,Eboost2, dual walbro, FIC 75lb, br7ef, Trutrac, Shaftmasters Shaft, 3.5" DP w/4" magnaflow dumped, turbo blanket, Circle D 3200, Jake's built 4l80w/brake, hydroboost, EFILive v2,Lunati dual springs,222/226 cam, cal-tracs, QA1 front shocks, Street/strip Bogarts,Drum swap, Alky-control,MSD8733 936 HP to the tire DD.

  5. #15
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by Slowrc View Post
    I am hooking up to the same gauge. I sent my V2 off to socal diesel and it got updated and now I see the ad1 voltage showing on the V2, but I can't get it to display the W02 on the V2.
    Thanks so much for any and all help guys!!!
    To see WO2xxx pids you need serial comms connection to the wideband.

  6. #16
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    Well , as per usual I wait so long in between sessions I am lost as a newbie. I was viewing the wide band on the V2 and logging it months ago before the upgrade to the new version. Help me get back on top of it please sir. I see the voltage on ad1 when I do the self test so the V2 is seeing the voltage variations.
    00 GMC,LQ4, Jarrett Faggart pistons, callies rods, Ebay studs, LS9 gaskets, 317's, KBRacing KIT, PT76/75, treadstone intercooler,Eboost2, dual walbro, FIC 75lb, br7ef, Trutrac, Shaftmasters Shaft, 3.5" DP w/4" magnaflow dumped, turbo blanket, Circle D 3200, Jake's built 4l80w/brake, hydroboost, EFILive v2,Lunati dual springs,222/226 cam, cal-tracs, QA1 front shocks, Street/strip Bogarts,Drum swap, Alky-control,MSD8733 936 HP to the tire DD.

  7. #17
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    The fail safe gauge is analog only. I have a thread where I set it up originally and it worked fine for a good while.
    00 GMC,LQ4, Jarrett Faggart pistons, callies rods, Ebay studs, LS9 gaskets, 317's, KBRacing KIT, PT76/75, treadstone intercooler,Eboost2, dual walbro, FIC 75lb, br7ef, Trutrac, Shaftmasters Shaft, 3.5" DP w/4" magnaflow dumped, turbo blanket, Circle D 3200, Jake's built 4l80w/brake, hydroboost, EFILive v2,Lunati dual springs,222/226 cam, cal-tracs, QA1 front shocks, Street/strip Bogarts,Drum swap, Alky-control,MSD8733 936 HP to the tire DD.

  8. #18
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by EspenT View Post
    ...
    Can I use the calc_pids for my setup?
    ...
    From the AEM data you posted:
    AFR 10 --> 0V --> lambda 0.683
    AFR 19.98 --> 4.99V --> lambda 1.365

    Find AFR as a function of V:
    (AFR-10)/(V-0) = (19.98-10)/(4.99-0) = 2
    AFR = V*2+10

    This is the same as CALC.AFR_PLX1, so you can use that pid... but the corresponding BEN pid CALC.BEN_PLX1 uses GM.AFR instead of GM.EQIVRATIO...

    so if you wanted to use GM.EQIVRATIO (which I would recommend), follow along (you already know algebra):

    0V --> lambda 0.683
    4.99V --> lambda 1.365

    Find lambda as function of V:
    (lambda-0.683)/(V-0) = (1.365-0.683)/(4.99-0) = 0.1367
    lambda = V*0.1367+0.683

    We now want to find the assumed stoich AFR...

    Solve V for lambda = 1:
    1 = V*0.1367+0.683
    V = (1-0.683)/0.1367 = 2.319V

    Find AFR for lambda = 1 (i.e. for V = 2.319V):
    AFR = 2.319*2+10 = 14.638

    so AEM device assumes stoich to be 14.638.


    So now modify CLC-00-030 from the above calc_pids.txt to read as follows:
    Code:
    *CLC-00-030
    AFR                8.0          18.0       .2  "{EXT.AD1}*2+10"
    LAM                0.5           1.5       .3  "{CALC.AEM1.AFR}/14.638"
    EQR                0.5           1.5       .3  "1/{CALC.AEM1.LAM}"
    BEN                0.5           1.5       .3  "{CALC.AEM1.LAM}*{GM.EQIVRATIO}"

  9. #19
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by Slowrc View Post
    The fail safe gauge is analog only. I have a thread where I set it up originally and it worked fine for a good while.
    WO2 AFR based on AD1 is a calc pid...

    V2 does not display calc pids;

    calc pids are displayed by the scantool (they can be added in after a log has been captured (select the calc pid(s) and do Save As to overwrite the log file).

  10. #20
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by Slowrc View Post
    Well , as per usual I wait so long in between sessions I am lost as a newbie. I was viewing the wide band on the V2 and logging it months ago before the upgrade to the new version. Help me get back on top of it please sir. I see the voltage on ad1 when I do the self test so the V2 is seeing the voltage variations.
    The only way to do this would be to go into V2 BBX and configure AD1 to have Custom Pid Properties:

    Click image for larger version. 

Name:	AD1 custom properties.png 
Views:	283 
Size:	52.6 KB 
ID:	20393


    Then while V2 is doing BBL, you click the ENTER key to show the custom pid properties.

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