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Thread: Fuel Trims/Learning will not disable

  1. #1
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    Default Fuel Trims/Learning will not disable

    Working on a 2002 LS2 based Corvette
    GENIII LS PCM

    I have forced it into OL, turned off all the STFT and LTFT stuff and it still wants to make STFT corrections. When I use the DVT to force into OL and disable learning it works for a bit then starts learning and making corrections all over again..

    Paul Meister
    EFI Calibrator/Managing Member, Torq Speedlab, LLC
    Specializing in late model Ford, GM and Dodge EFI Calibrations
    SCT, EFI Live, HP Tuners, FAST, BS3 and much much more

  2. #2
    Lifetime Member SSpdDmon's Avatar
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    Tune file?

  3. #3
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    How do I attach a file here?

    Paul Meister
    EFI Calibrator/Managing Member, Torq Speedlab, LLC
    Specializing in late model Ford, GM and Dodge EFI Calibrations
    SCT, EFI Live, HP Tuners, FAST, BS3 and much much more

  4. #4
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    At the bottom where it says Post Quick Reply and Go Advanced, click Go Advanced. Type your post, then scroll down to Additional Options. There will be a button labeled Manage Attachments, click it then Add Files in the upper Right. Click Select Files, select the ones you want, then click OK then Upload Files. Click Done then you'll be back at the main posting page, click Submit. Should be set!

    (Sorry if its a little wordy)
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, tuned, turbo mods, etc.
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

  5. #5
    Joe (Moderator) joecar's Avatar
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    Is B4206 disabled...?

  6. #6
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    Here is the latest working calibration. Another annoying issue I am having with the maf failed is on startup, the maf does not "fail" right away and the car runs like crap. Once it fails (I can see it when my CEL comes on) it purrs like a kitten

    With the cam in the car I do not want any fuel correction right now (or ever at idle)....especially when tuning. Once it is done, I do not mind having some adjustment during cruise

    ScottRoss_02Vette_A&ABlower_ZR1MAPSensor_FASTIntake_60lbInjectors_KooksLT0008.tun

    Paul Meister
    EFI Calibrator/Managing Member, Torq Speedlab, LLC
    Specializing in late model Ford, GM and Dodge EFI Calibrations
    SCT, EFI Live, HP Tuners, FAST, BS3 and much much more

  7. #7
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    Quote Originally Posted by joecar View Post
    Is B4206 disabled...?
    Does not exist

    Paul Meister
    EFI Calibrator/Managing Member, Torq Speedlab, LLC
    Specializing in late model Ford, GM and Dodge EFI Calibrations
    SCT, EFI Live, HP Tuners, FAST, BS3 and much much more

  8. #8
    Joe (Moderator) joecar's Avatar
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    Hi Paul,

    COS's have B3647 instead of B3605 and B4206...

    for any cell in B3647 set to stoich AFR, the PCM will trim using STFT.

    this is a feature (SOL = semi open loop);
    Last edited by joecar; April 27th, 2011 at 08:10 AM.

  9. #9
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    Quote Originally Posted by joecar View Post
    COS has B3647 instead of B3605 and B4206...

    for any cell in B3647 set to stoich AFR, the PCM will trim using STFT.
    This is already set and done. I do not want any trims at idle. Cam is too big thus resulting in a false lean condition at idle and its all over the place. I use the DVT to kill fuel trims and force back into OL but it only lasts for a few minutes

    I need to kill all learning/trims and keep it in OL.

    Paul Meister
    EFI Calibrator/Managing Member, Torq Speedlab, LLC
    Specializing in late model Ford, GM and Dodge EFI Calibrations
    SCT, EFI Live, HP Tuners, FAST, BS3 and much much more

  10. #10
    Joe (Moderator) joecar's Avatar
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    All those lambda 1.00 cells will trim using STFT.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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