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Thread: AFR Nightmare

  1. #1
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    Default AFR Nightmare

    Guys, I haven't done any tuning on my car in a couple of years. I got things pretty well dialed in using the Calc.VE method, checked again after about a year, everything was still good. A couple of weeks ago I went to the track for the first time in a year and a half. My times were off about 6 tenths and 7 mph. I logged my runs and when I reviewed them, my logged AFR readings were way off - 20-30:1

    I'd been through this before, so I went back to an old thread and reset my LM1 settings. I think I may have upgraded my 7.5 to a newer version, and thus overwritten my sae.generic settings. Well after returning the settings to what I had before, now the Calc PID selections for AFR show up as unsupported.

    I took a brief WOT run on the street the other day, and the LM1 screen showed AFR's of 16-17:1. Normal driving shows normal readings. I want to get the AFR data into EFILive for analysis, but I can't get it to work as it did before.

    I'm really rusty on tuning skills, so I need some help to get this to work once again. Any help is appreciated!
    2000 Formula: 12212156, bolt-ons, 3600 stall, 3.42's.

  2. #2
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    Here are the settings that worked for me before. I only modified these settings:

    LM-1 sae_generic.txt pid:
    *CLC-00-928
    V 0.0 5.0 .1 "{EXT.AD1}"
    AFR 10.0 20.0 .2 "(({EXT.AD1}-({EXT.AD2}-2.5))*3)+7.35 "
    *CLC-00-929
    factor 0.0 2.0 .2 "{CALC.AFR_LM11.AFR}/{GM.AFR}"
    *CLC-00-930
    V 0.0 5.0 .1 "{EXT.AD2}"
    AFR 10.0 20.0 .2 "{EXT.AD2}*10"
    *CLC-00-931
    factor 0.0 2.0 .2 "{CALC.AFR_LM12.AFR}/{GM.AFR}"

    This is the thread describing my last journey through this:
    http://forum.efilive.com/showthread....g-amp-Settings
    2000 Formula: 12212156, bolt-ons, 3600 stall, 3.42's.

  3. #3
    Joe (Moderator) joecar's Avatar
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    Default

    Hey Rev,

    I can edit those into the latest Calc.VET calc_pids.txt...

    leave sae_generic.txt untouched;

    can you post your calc_pids.txt file here.

  4. #4
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    Ok great, thanks. I'll revert the sae_generic settings back to standard.
    Attached Files Attached Files
    2000 Formula: 12212156, bolt-ons, 3600 stall, 3.42's.

  5. #5
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    I went ahead and upgraded to build 211 (I was still on 165). All my PIDs are now showing as being supported, but the LM-1 AFR readings are still way off.
    Last edited by RevGTO; November 3rd, 2012 at 04:49 PM.
    2000 Formula: 12212156, bolt-ons, 3600 stall, 3.42's.

  6. #6
    Joe (Moderator) joecar's Avatar
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    Is your LM-1 programmed the same as the LC-1 (0V=AFR7.35 and 5V=AFR22.35)...?

  7. #7
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    Well, thanks to your question, I checked the settings on my LM-1 and found them to be completely different from what I remember programming. No, they're not the same as the LC-1 settings. (I do remember trying them at one point). I don't know how they could change by the unit sitting on the shelf, but I've reprogrammed both the LM-1 and my sae_generic.txt to what I posted in the thread referenced above, and will log tomorrow and see if it works:

    Analog Output One:
    2.501v @ 10.01AFR
    2.501v @ 19.99AFR

    Analog Output Two:
    0.88333v @10:1 AFR
    4.21667v @20:1 AFR

    LM-1 sae_generic.txt pid:
    *CLC-00-928
    V 0.0 5.0 .1 "{EXT.AD1}"
    AFR 10.0 20.0 .2 "(({EXT.AD1}-({EXT.AD2}-2.5))*3)+7.35 "
    *CLC-00-929
    factor 0.0 2.0 .2 "{CALC.AFR_LM11.AFR}/{GM.AFR}"
    *CLC-00-930
    V 0.0 5.0 .1 "{EXT.AD2}"
    AFR 10.0 20.0 .2 "{EXT.AD2}*10"
    *CLC-00-931
    factor 0.0 2.0 .2 "{CALC.AFR_LM12.AFR}/{GM.AFR}"
    2000 Formula: 12212156, bolt-ons, 3600 stall, 3.42's.

  8. #8
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    Well, those settings didn't work. Upgrading to build 211 certainly didn't help my problems. Even before changing the LM-1 and sae_generic settings, it started showing a bunch of simple pids like ECT, TP, RPM, etc. as unsupported. Connecting to the car validates the pids, but opening the Scantool after disconnecting shows them unsupported again.

    It's ironic that way back when on 7.3.3 I had zero problems using my LM-1. Issues started with 7.5, and finally got them fixed. Now the latest upgrade not only still has my AFR's off, but has started this pid recognition problem.
    Last edited by RevGTO; November 6th, 2012 at 04:58 PM.
    2000 Formula: 12212156, bolt-ons, 3600 stall, 3.42's.

  9. #9
    Joe (Moderator) joecar's Avatar
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    You may have to validate pids and reprogram BBL.

    BBL does not log calc pids, they have to be added in after the log...

    (i.e. after uploading a BBL log, you have to select the calc pids, and save the log file).

  10. #10
    Joe (Moderator) joecar's Avatar
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    If you edit calc_pids.txt rather than sae_generic.txt, then you can easily restore your edited calc_pids.txt from a backup copy after each software update.

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