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Thread: 1227727 1227730 ECM Information $8D

  1. #1
    EFI GearHead ! EagleMark's Avatar
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    1227727 1227730 ECM Information $8D

    1227727 1227730 ECM Information $8D 1990 - 91 Y and F CAR 5.7L TPI

    For information on applications using the 1227730 including wiring diagrams check out:
    http://www.gearhead-efi.com/Fuel-Inj...CM-information

    For information on applications using the 1227727 including wiring diagrams check out:
    http://www.gearhead-efi.com/Fuel-Inj...CM-information

    *Work in Progress!*

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  2. #2
    EFI GearHead ! EagleMark's Avatar
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    TunerPro Definition files for 1227727 1227730 $8D

    TunerPro Definition files for 1227727 1227730 $8D

    $8D-1227730-V1.1 adx and xdf by JeepsandGuns

    1990 Corvette Y car adx by captiankawasaki
    http://www.gearhead-efi.com/Fuel-Inj...p-CCM-and-Dash
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    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  3. #3
    EFI GearHead ! EagleMark's Avatar
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    Bin files for the 1227727 1227730 $8D

    Bin files for the 1227727 1227730 $8D
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    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  4. #4
    EFI GearHead ! EagleMark's Avatar
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    Super AUJP Files fo $8D

    Super AUJP Files. Please download these and read the credits for who made them. These are noted as Copyright documents for personal use only.
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    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  5. #5
    EFI GearHead ! EagleMark's Avatar
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    $8D Hac 1227727 1227730 ECM Extended VE fueling tables

    $8D Hac 1227727 1227730 ECM and extended VE fueling tables
    Attached Files Attached Files

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  6. #6
    EFI GearHead ! EagleMark's Avatar
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    Spreadsheet made by Dave W to adjust VE fuel tables from BLM readings.

    Thanks Dave W!
    Attached Files Attached Files

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  7. #7
    EFI GearHead ! EagleMark's Avatar
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    $8D Source code comented AUJP

    Donated by JP86SS!
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    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  8. #8
    EFI GearHead ! EagleMark's Avatar
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    More $8D goodies from 84Elky!

    Along with another write up with updated files on Knock Counts and Knock Retard Degrees – AUJP $8d
    http://www.gearhead-efi.com/Fuel-Inj...es-%96-AUJP-8d
    Attached Files Attached Files

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  9. #9
    Fuel Injected! 84Elky's Avatar
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    1227727 1227730 ECM Information $8D

    Have found the culprit it the Fan Enable/Disable temperature logic of the AUJP $8D code. It appears this code was developed with the thought that no one (except me) would ever set the Disable temperature >= the Enable temperature (while testing or otherwise).

    Bottom line, if you do so, the fan(s) will run, but not at full speed because they are constantly being turned on and then off every 200ms. Seems they would have programmed this differently, but at the time they probably assumed no one would ever be changing such values but its still not good coding.

    FWIW - Attached are Fan 2 flow logic documents highlighting the issue. Fan 1 is identical to Fan 2 except for Fan 1 run-on times which do not apply to Fan 2, as those values are set = 0 in AUJP.

    See here for other details:
    http://www.gearhead-efi.com/Fuel-Inj...in-F8-Question
    http://www.gearhead-efi.com/Fuel-Inj...nd-7730-Pin-F8
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  10. #10
    Fuel Injected! 84Elky's Avatar
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    1227727 1227730 ECM Information $8D

    EDIT 3/23/2014 -------------
    A new Version 3 of the AE Document has been uploaded. The "Fuel Out Single and Double Fire Flag Logic.doc" document previously uploaded separately has been incorporated into Version 3 as an Appendix so it's no longer provided separately.

    It's important that all prior versions of these two documents be discarded as they contain an error with regard to injector firing. Many thanks to RBob at ThirdGen.org for his contribution to the corrections.


    Version History

    Version 3 March 23, 2014
    • Corrected the Injector Firing Process section to properly reflect how the injectors are fired.
    • Incorporated the Fuel Out Routine document previously published separately into this document as Appendix E.


    Version 2 March 11, 2014
    • Page 4, under Fuel Summary, changed the PW required to invoke Single Fire Mode from 1.1ms to 0.85ms to correctly state the proper transition PW.


    Initial Version February 13, 2014

    ================================================== ================

    Like many, based on the number of posts, I too have been struggling with Acceleration Enrichment. Still am. So some time ago decided to dive into the AUJP $8D code in an attempt to understand what goes on under the covers. Bottom line - a lot! Many pages of notes produced during the process were converted into a document for my reference. But decided to post it in hope it will help others using this code mask.

    Every effort has been made to check and double check to ensure accuracy. But life happens, so would appreciate feedback on anything that appears incorrect so changes can be made.

    Hope this helps!
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