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Thread: lc1 BEN factor for auto ve leaning out afr

  1. #11
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    # ================================================== ============================
    # File details
    # ------------
    #
    # This section defines various details about the file format.

    *FILE

    #Parameter Value Description
    #---------- ---------------- ---------------------------------------------------
    VERSION 7.1.1 File version
    DECSEP . Decimal separator used in this file


    # ================================================== ============================
    # Units
    # -------------------
    # See sae_generic.txt for more information on the *UNITS section

    *UNITS

    #Code System Abbr Description
    #-------- ---------- -------- -------------------------------------------------------------
    None None "" "No units"
    K Metric "K" "Degrees Kelvin"
    R Imperial "R" "Degrees Rankine"


    # ================================================== ============================
    # Add slot definitions here
    # --------------------------------
    # See sae_generic.txt for more information on "SLOT" formats
    #
    #Units Low High Fmt Expression
    #------------ ------------- ------------- ---- --------------------------------------------------------------

    *CLC-00-032
    factor 0 4 .0 "{GM.EQIVRATIO}=1"

    *CLC-00-110
    factor 0.5 1.5 .4 "{GM.EQIVRATIO}*{EXT.WO2LAM1}"

    *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-00-273
    C 0.0 100.0 .1 "{GM.DYNAIRTMP_DMA.C}"
    F 40.0 220.0 .1 "{GM.DYNAIRTMP_DMA.F}"
    K 280.0 380.0 .1 "{GM.DYNAIRTMP_DMA.C}+273.15"
    R 500.0 680.0 .1 "{GM.DYNAIRTMP_DMA.F}+459.67"

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

    *CLC-00-305
    % 0.0 100.0 .2 "{CALC.SELBEN}*{CALC.VEN.%}"
    VE 0.0 2.468 .4 "{CALC.SELBEN}*{CALC.VEN.VE}"

    *CLC-00-310
    gps 0.0 400.0 .1 "{GM.VETABLE_DMA.VE}/{CALC.DAT.K}*{SAE.MAP.kPa}*{SAE.RPM}/15"

    *CLC-00-315
    gps 0.0 400.0 .1 "{CALC.SELBEN}*{CALC.MAFN.gps}"

    *CLC-00-430
    VE 0.0 4.0 .4 "{GM.DYNCYLAIR_DMA}*{CALC.DAT.K}/{SAE.MAP.kPa}"

    *CLC-00-435
    gcyl 0.0 1.0 .4 "{GM.VETABLE_DMA.VE}/{CALC.DAT.K}*{SAE.MAP.kPa}"


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

    CALC.DAT F273 CLC-00-273 "C,F,K,R" Tuning "Dynamic Air Temperature"

    CALC.VEN F300 CLC-00-300 "%,VE" Tuning "Calculated VE, not corrected"
    CALC.VET F305 CLC-00-305 "%,VE" Tuning "Calculated VE, BEN corrected"

    CALC.MAFN F310 CLC-00-310 gps Tuning "Calculated MAF, not corrected"
    CALC.MAFT F315 CLC-00-315 gps Tuning "Calculated MAF, BEN corrected"

    CALC.VEDCA F430 CLC-00-430 VE Tuning "Calculated VE (from DCA)"
    CALC.DCAVE F435 CLC-00-435 gcyl Tuning "Calculated DCA (from VE)"

  2. #12
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    thanks for the help by the way!! I really appreciate it

  3. #13
    Joe (Moderator) joecar's Avatar
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    I typically log everything in lambda and cross reference it to an e85 chart to keep things more simple. why do you think my wideband isn't working?
    Quote Originally Posted by joecar
    Its reading mostly 7.8...
    I meant AFR 7.38 for LC12 and AFR 7.45 for LC12...


    you logs show that both wideband flatline at AFR 7.38...

    this means that your LC-1's are putting out zero volts... they're not working or not connected properly... ( do you have wideband ground connected to FS...?)

  4. #14
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by 98camaro408 View Post
    that is a correct reading, my lambda showing 7.8 is my actual afr
    in your log I see the LC-1's are pegging at AFR 7.38 (LC12) and AFR 7.45 (LC11) which corresponds to zero volts (0.01V-0.03V... i.e. zero);

    since the pids AFR_LC11 and AFR_LC12 are based on stoich AFR 14.7, the 7.8 (7.38, 7.45) you see cannot be actual AFR... even if you are running E85 (stoich 9.7) your LC-1's should still report AFR 14.7 at stoich.

    when I have the MAF fail set to 1,
    do you see a MAF DTC show up (either of P0101, P0102, P0103)...? This is important. Edit: I see P0103 in your log, this is good.

    my VE table is set to run pretty rich as I believe it suppose to during the first run with the auto ve tutorial (it says to add 15% to the entire table I think). my wideband calibrated to e85 shows around 12.6. when i run with my MAF tune I idle around 16 afr and cruise around 12.5 afr at 2k rpm.
    I don't see that in your log... do you have any more current logs to post...
    How did you calibratate your wideband(s) to E85, your log shows you're using the standard LC-1 pids which are calibrated for E00.

    right now i bounce between 2 tunes, one runs pretty good with the MAF activated, the other is setup with the higher fuel added to the VE table and the MAF set to fail. I run the second tune trying to dial in my VE table but so far no luck, I played with it last night but had some technical difficulties last night with my laptop battery and didn't want to lock my pcm.
    Yes, make sure laptop battery and vehicle battery are both fully charged.

  5. #15
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    81 to jerrys.efi

    here is a short log I took when I was running in my MAF tune. It shows my lambda running closer to 1.

    I have the logworks program on my computer that logs and programs the lc1, I have it set to display on the gauge what afr would be running e85. I can also set it to display lambda or E00.

  6. #16
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    would posting my tune help at all? maybe then you can see how I have my VE table set up and if it looks correct for what I am trying to do.

  7. #17
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by 98camaro408 View Post
    would posting my tune help at all? maybe then you can see how I have my VE table set up and if it looks correct for what I am trying to do.
    Yes, I'll take a look.

  8. #18
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    here is the tune where I changed my afr to 14.7 but never got to run it due to technical difficulties. I should have made every change according to the auto ve tutorial. I think when I ran this tune with my 9.765 stoich it ran decent. according to the tutorial I had to add 15% fuel to the table but the car wouldn't even start it was so rich, I ended up backing off the fueling around 30% ( on the backup ve) to get my idle afr okay and went from there. I'm not sure if i mentioned this but this is for a 98 camaro so I have to tune everything with the backup table and I copied my high octane table and pasted it into my low octane table.

  9. #19
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by 98camaro408 View Post
    ...
    according to the tutorial I had to add 15% fuel to the table but the car wouldn't even start it was so rich, I ended up backing off the fueling around 30% ( on the backup ve) to get my idle afr okay and went from there.
    What engine mods do you have over stock...?
    The AutoVE tutorial says 15% in that it assumes you have larger displacement, huge flowing heads, and huge cam... and 15% is too high even at that.

    I'm not sure if i mentioned this but this is for a 98 camaro so I have to tune everything with the backup table and I copied my high octane table and pasted it into my low octane table.
    Yes, with MAF failed, PCM runs from the Backup VE table and LO Spark table.

  10. #20
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    it is a fully forged 408, prc 247cc heads, fast 92mm intake/throttle body, 12:1 CR, custom grind cam 243/255 .629/.629 113+4, e85 with siemens 80lb injectors and 450lph pump.

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