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Thread: Scaling Injectors?

  1. #21
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    I have a LC-1 Wideband thats in the process of being installed, slight issue with the heater ground showing a short. I have a good chassis ground have tried 2 other grounds and have tried a different O2 sensor and a 2nd LC-1 unit, still all showing the same 1flash error. I have spoke with Innovate about it and we are trying to fix it.

    So far I am not trying to Tune SD. MY car is still on the lift a foot off the ground. I am not going to be trying to dial in the VE with a wideband until I figure out why idle trims are so far off when I have the correct IFR settings for the Injectors I confirmed that I have.

    I will be out at the shop shortly with my fuel pressure guage to confirm fuel pressure at the rails.
    2000 Corvette Twin Turbo
    2004 CTS-V TVS 1900
    2006 TBSS TVS 1900

    All Tuned by
    Rad Tunes by Troy
    aka Vetteboy2k

  2. #22
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    OK LC-1 Wideband is squared away, no more issues with that...however tested fuel pressure at the rail and I am getting 61.5psi. I do have a racetronix boost-a-pump installed so thats why its probally higher than 58.

    Now I have the IFR table set for the injectors at 58psi, I know I can recalculate them for the 61.5psi, though don't think that will do any good b/c it will just make me leaner than I already am. Is that true?

    What could be the cause of the LTFT's being so lean? Pegged at +25!!!
    2000 Corvette Twin Turbo
    2004 CTS-V TVS 1900
    2006 TBSS TVS 1900

    All Tuned by
    Rad Tunes by Troy
    aka Vetteboy2k

  3. #23
    Joe (Moderator) joecar's Avatar
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    Some possibilities:
    Air leak before O2S.
    Air leak after MAF.
    MAF incorrect.
    VE incorrect.
    IFR incorrect.

  4. #24
    Joe (Moderator) joecar's Avatar
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    Log the injector pulse widths and duty cycles and see if the injectors are being pegged;
    if they are, then they're not flowing properly or they're smaller than your previous ones.

  5. #25
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    Ok, well tonight I was back at the shop again after work. I finished the Wideband O2 install, put the dash back together some, hooked up the WBO2 to flashscan and saved a log. I logged injector pulse width and Injector duty cycle as JoeCar said above, but i also logged the wideband AFR, commanded AFR and some other things. If someone can look at it the file is here http://www.easiwebsites.com/efilive/..._Ltft_0000.efi and see if anything pops out at anyone of you.

    Side note heres some pics of my install
    Fuel Pressure at 61.5

    Flashscan LC-1 Hookup

    Dash Boost Guage A/C Lights on

    Dash Boost Guage A/C Lights off

    Dash Manual Boost Controller and Boost Guage

    Dash Manual Boost Controller and Boost Guage More light
    2000 Corvette Twin Turbo
    2004 CTS-V TVS 1900
    2006 TBSS TVS 1900

    All Tuned by
    Rad Tunes by Troy
    aka Vetteboy2k

  6. #26
    Senior Member WicketMike's Avatar
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    i used redhardsupras excel file for the 42#'s. i used 42lbs @ 43.5psi and put it into the IFR table, is there any other injector tables i need to fix now that i have these 42lbs?

    thanks

    98' White TA A4 TSP 231/237 PP Stage II 59cc heads
    401rwhp (unlocked) 1.594 60'-11.60 e.t.-116.98 mph
    ---------
    98' Sport Gold Metallic TA M6 - 13.39 e.t. Bone Stock
    My Trans Ams
    ---------
    2006 Chevy Monte Carlo SS 5.3L LS4 (wifes car) stock (for now)

  7. #27
    Senior Member WicketMike's Avatar
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    what about injector offset table?

    98' White TA A4 TSP 231/237 PP Stage II 59cc heads
    401rwhp (unlocked) 1.594 60'-11.60 e.t.-116.98 mph
    ---------
    98' Sport Gold Metallic TA M6 - 13.39 e.t. Bone Stock
    My Trans Ams
    ---------
    2006 Chevy Monte Carlo SS 5.3L LS4 (wifes car) stock (for now)

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