Results 1 to 4 of 4

Thread: Virtual Flex Fuel

  1. #1
    Potential Tuner
    Join Date
    Aug 2024
    Posts
    3

    Virtual Flex Fuel

    I've seen the option for virtual flex fuel in the ECM. I'm looking to use this to help with accidental misfueling with flex fuel.

    How does the ECU determine the flex fuel virtually?

  2. #2
    Banned
    Join Date
    Mar 2022
    Location
    Indiana
    Posts
    4,289
    LTFT's

  3. #3
    Tuning Addict 5FDP's Avatar
    Join Date
    May 2012
    Location
    Rogers, MN
    Posts
    14,062
    Don't use it, it's never super accurate and most people always disable it. Install a real sensor if you want to use flex fuel.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  4. #4
    Senior Tuner
    Join Date
    Nov 2006
    Location
    North Carolina
    Posts
    4,748
    It causes a lot of issues even in OEM applications.
    [email protected] - [email protected]
    Email tuning!!!, Mail order, Dyno tuning, Performance Parts, Electric Fan Kits, 4l80e swap harnesses, 6l80 -> 4l80e conversion harnesses, Installs