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Bad Gas Mileage

Discussion in '2nd Gen. Tacomas (2005-2015)' started by sdheda, Oct 23, 2016.

  1. Oct 23, 2016 at 10:25 AM
    #1
    sdheda

    sdheda [OP] Well-Known Member

    Joined:
    May 9, 2010
    Member:
    #36798
    Messages:
    242
    Gender:
    Male
    First Name:
    Sherj
    HB, Ca
    Vehicle:
    '10 TRD OR 4x4 DC
    In progress :/
    In my failed attempt at installing some DTLT headers, I think I might have damaged my O2 sensor. The problem is that before I was getting ~17mpg, but now I'm getting ~14mpg. The check engine light is not on, and there are no codes being thrown.

    Here are some data that I captured using a bluetooth ODBII and the Torque app. I'm not sure what the normal values should be. The truck had been running for about 10 minutes before I started capturing the data.

    Any thoughts? Could it be an exhaust leak instead of a bad O2 sensor?

    @ IDLE

    Screenshot_2016-10-23-10-13-07.jpg Screenshot_2016-10-23-10-14-06.jpg Screenshot_2016-10-23-10-14-39.jpg

    @ 2500RPM

    Screenshot_2016-10-23-10-09-52.jpg Screenshot_2016-10-23-10-11-30.jpg
     
  2. Oct 23, 2016 at 3:51 PM
    #2
    sdheda

    sdheda [OP] Well-Known Member

    Joined:
    May 9, 2010
    Member:
    #36798
    Messages:
    242
    Gender:
    Male
    First Name:
    Sherj
    HB, Ca
    Vehicle:
    '10 TRD OR 4x4 DC
    In progress :/
    Would a leak in the exhaust manifold gasket or at one of the crush gaskets between the two O2 sensors cause a drop in MPG?
     
  3. Oct 23, 2016 at 9:56 PM
    #3
    kgarrett11

    kgarrett11 Master Yoda

    Joined:
    Jun 10, 2015
    Member:
    #157122
    Messages:
    3,600
    First Name:
    Garrett
    CA desert
    Vehicle:
    2015 DCLB
  4. Oct 24, 2016 at 4:14 AM
    #4
    My12DCLB

    My12DCLB 21PRO

    Joined:
    Jun 28, 2016
    Member:
    #190771
    Messages:
    89
    Gender:
    Male
    First Name:
    Rich
    KS
    Vehicle:
    White 21 TRD Pro
    I'd say the bad gas mileage is the only bad thing about these trucks. It is bad when my buddy's GMC Denali gets better gas mileage than me.
     

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