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Thread: Better mpg while cruising? Srt4

  1. #1
    Potential Tuner
    Join Date
    Mar 2020
    Posts
    8

    Better mpg while cruising? Srt4

    Hi can anyone direct me what to adjust? My aem afr shows 13.7 on cruise control at 45mph 2k rpm or 75mph 3k rpm. Idle i get 14.6.
    I searched but most people ask about wot.
    Thank you!

  2. #2
    Senior Tuner edcmat-l1's Avatar
    Join Date
    Aug 2006
    Location
    5BA8
    Posts
    3,253
    Post a tune file and data log if you want help.

    EFI specialist
    Advanced diagnostics, tuning, emissions
    HPtuners dealer and tech support
    email=[email protected]

  3. #3
    Potential Tuner
    Join Date
    Mar 2020
    Posts
    8
    Well i realized i forgot to reset my fuel trims ST LT. Mpg all good now. I have no cat, my AFR sensor in 2nd bung, turned off 2nd S1B2 and disconnected the oem 02 sensor.
    After a tune, don't forget to reset your fuel trims by taking off your ASD fuse(20A) in engine bay.

    Hope this helps someone in the future.