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Thread: lc1 BEN factor for auto ve leaning out afr

  1. #31
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    okay well that makes sense as to why i couldn't see it either then. after work today I'll go out and make a new log to post up. just curios why the voltage could be at zero for one log but show a good lambda reading on another log? intermittent failure?

  2. #32
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    That's what we're trying to figure out. The log in MAF mode will help us see what's happening. Just make sure you're logging EXT.AD1 and EXT.W02LAM1... also log MAF Frequency and MAF airflow.

  3. #33
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    Do you have 1 or 2 widebands...?

  4. #34
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    I am currently running 1 wideband. what is EXT.AD1? my tuning computer is at home and that pid doesn't sound familiar.

  5. #35
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    okay I did some research and it looks like I need to have wires from my lc1 connected to the top of my v2 to get the external voltage to read anything. I never hooked them up because I run a serial cable into the v2 coming from my wideband. is this not correct? do I need to have the narrowband voltage wired into the v2?

  6. #36
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by 98camaro408 View Post
    okay I did some research and it looks like I need to have wires from my lc1 connected to the top of my v2 to get the external voltage to read anything. I never hooked them up because I run a serial cable into the v2 coming from my wideband. is this not correct?
    Yes, not correct... 0-5V analog wideband needs its signal/ground wires connected to FSV2's AD1+/- inputs (respectively).

    The analog pids are EXT.AD1; and the calc pids are CALC.AFR_LC11 and CALC.BEN_LC11.

    ( serial wideband uses a different set of pids, namely EXT.WO2xxx1 )

    do I need to have the narrowband voltage wired into the v2?
    No, narrowband signal/ground goes to PCM, not to FSV2; you can log this from the PCM as GM.HO2S11 and GM.HO2S21.

  7. #37
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    okay, I got it rigged up enough to get a test out of it. I think I need new information plugged into the wideband so that it logs correctly on the scanner. right now it is just set up as whatever it comes from factory as which if I remember it was like .1v to 1.1v. but it is working.
    Attached Files Attached Files

  8. #38
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    Click image for larger version. 

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  9. #39
    Joe (Moderator) joecar's Avatar
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    The LC-1 has two analog outputs:
    - channel 1 (yellow wire) is 0-1.1V narrowband signal,
    - channel 2 (brown wire) is 0-5V wideband signal,
    both are wrt ground (green or white wires, and not the black wire).

    So you want channel 2 to go to FSV2.

  10. #40
    Joe (Moderator) joecar's Avatar
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    Also, from your new log file analog v1 test.efi you really do need to download V7 and V8 software and install both...

    see here: Sep-2017-Release-Candidate-3

    and then with FSV2 connected to your PC, run V8 Scan & Tune, click Check Firmware, and follow the prompts to update your FSV2's firmware.



    More info: Setting-up-a-FSV2-from-scratch

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