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20% MPG Increase!

Discussion in '3rd Gen Tundras (2014-2021)' started by RussellVaughan, Feb 13, 2017.

  1. Feb 13, 2017 at 9:00 AM
    #1
    RussellVaughan

    RussellVaughan [OP] New Member

    Joined:
    Jul 27, 2016
    Member:
    #4010
    Messages:
    261
    Gender:
    Male
    Houston
    Vehicle:
    2015 Gray TSS 5.7 CM SR5 4x4
    Okay, so I lied. Sorry! But here's what really happened, and I hope someone can explain it.

    My '15 SR5 entune has been super frustrating. Freezing up, GPS turning on by itself and going berserk...pandora never working, etc. So I finally called toyota and they said take it to the dealer and have the audio driver updated to D4 or D54.

    ...so back from the dealer (they upated to D4) and I noticed something really interesting. After I filled up, Miles-To-Empty was 428. The highest I've ever seen is 355.

    Obviously my gas mileage did not improve by 20%. Only thing I can think of is the update allows the computer to acknowledge the fuel reserve.

    Anyone out there know for sure?
     
  2. Feb 13, 2017 at 9:02 AM
    #2
    BlueFalconActual

    BlueFalconActual Field Day Inspector Extraordinaire

    Joined:
    Jun 1, 2016
    Member:
    #3495
    Messages:
    1,631
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    Male
    First Name:
    Kevin
    29 Palms, CA
    Vehicle:
    Tundra-less
  3. Feb 13, 2017 at 9:06 AM
    #3
    Relentless

    Relentless Eric @Relentless Fab Vendor

    Joined:
    Jan 6, 2014
    Member:
    #19
    Messages:
    899
    Gender:
    Male
    First Name:
    Eric
    East of the Sierras(Reno), Nevada
    Vehicle:
    '14 Crewmax TRD 4x4> '15 Duramax SLT
    Just a few, more to come
    If they reset the ECU or disconnected the battery in the process then your miles to empty may be reading just on the miles since you got the work done, which if you were turning higher MPG's over the short period since the reset vs your usual average then it'll show higher now and then taper back down over time
     
    HUTCHJ and 14burrito like this.
  4. Feb 13, 2017 at 9:07 AM
    #4
    csuviper

    csuviper Moderator Staff Member

    Joined:
    Jan 6, 2014
    Member:
    #38
    Messages:
    17,129
    Gender:
    Male
    First Name:
    Brian
    Broomfield, CO
    Vehicle:
    2019 TRD Sport CM 5.7L 4X4
    Some Mods :) See build thread for details
    Na it just reset the system. Drive a few weeks for the truck to relearn and it will be back where it was.
     
  5. Feb 13, 2017 at 6:46 PM
    #5
    bobeast

    bobeast really old member

    Joined:
    Feb 11, 2015
    Member:
    #960
    Messages:
    1,527
    Gender:
    Male
    First Name:
    Bob
    Hollister, CA
    Vehicle:
    2008 DC
    - Bull Bar - LED Bunny Burners - AMP retractable running boards - Headlight leveling retrofit - P3 Brake Controller - 60% rear seat delete - relocation of Sub to rear wall - Bilstein 5100 x4, top setting with 2 shims per side - Coach builder +2 rear shackles w/carrier bearing drop - Firestone Air bags - on-board compressor with auto-leveling - Dual Undercover Swing Boxes. - P285/65/R20 (34.6") BFG TA KO2's - TRD Front skid plate - Pop & Lock Tailgate lock - Remote Tailgate mod - LED Headlights - Nav Bypass - iPhone integration - Serius/XM retrofit - 25% front tint - Bizon electric tonneau cover - Power folding tow mirror upgrade - 2010+ leveling Headlight mod - Auto-fold mirror mod. - one-touch lane changer mod - Flash to open garage opener mod - Rigid H/L fog light upgrade - Pushbutton / Remote start mod.
    Takes a while for the computer to get reintroduced to reality.
     
    HUTCHJ likes this.
  6. Feb 14, 2017 at 10:28 PM
    #6
    Abrams65

    Abrams65 New Member

    Joined:
    Sep 10, 2016
    Member:
    #4486
    Messages:
    123
    Gender:
    Male
    First Name:
    Cliff
    WV
    Vehicle:
    16 Tundra MGM SR5 CM OR/15 Corolla S
    ICI Magnum RT Steps, 18' LED Foglights
    WOW, nothing like taking the wind out of a guys sails. :boink:
     
    Notachickmagnet likes this.

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