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Fuel econamy issue

Discussion in '2nd Gen. Tacomas (2005-2015)' started by fredlyzone, Feb 14, 2018 at 8:56 AM.

  1. Feb 14, 2018 at 8:56 AM
    #1
    fredlyzone

    fredlyzone [OP] Member

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    I have a 2010 TRD Offroad 2wd with 110000 miles and my number of miles per gallon has fallen off lately. It has had regular maintenance and overall runs well. Have any of your had this issue and done anything to correct the issue? I run the Iridium plugs but have had them in for 50k. What about cleaning the fuel injectors? Any advice would be greatly appreciated.
     
  2. Feb 14, 2018 at 9:02 AM
    #2
    irayfz6

    irayfz6 Well-Known Member

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  3. Feb 14, 2018 at 11:01 AM
    #3
    grizquad

    grizquad Well-Known Member

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    I see you are in Texas, I am in New England. Every winter mileage drops off, change of formulation and just plain cold. I know Texas has had some pretty cold and wild weather this winter, wait until Spring and everything should go back to normal. I have read that Iridium plugs (from articles here) don't really help mileage. Last summer went back in with normal Denso plugs and my mileage went up a little.
     
    outlawtacoma and fredlyzone [OP] like this.
  4. Feb 14, 2018 at 11:14 AM
    #4
    nd4spdbh

    nd4spdbh Well-Known Member

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    OP what are you MPG's?
     
  5. Feb 14, 2018 at 11:15 AM
    #5
    MattCowsmasher

    MattCowsmasher Slicker than goosesh!t, sharper than bear claws

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    Winter blend gas an in colder conditions vehicles run richer an air is more dense allowing more in the same allotted space. Therefore more fuel consumption you ever notice on cool day your truck is a little peppier that’s what’s happening. Hope this helps.:thumbsup:
     
  6. Feb 14, 2018 at 11:17 AM
    #6
    fredlyzone

    fredlyzone [OP] Member

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    Push Guard, Modified Skid Plate, Bug Deflector.
    I get bewteen 14-16 in the city a bit more if it is all highway driving.
     
  7. Feb 14, 2018 at 11:29 AM
    #7
    fredlyzone

    fredlyzone [OP] Member

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    Push Guard, Modified Skid Plate, Bug Deflector.
    I don't think it is a Winter thing but I guess time will tell. It will be warm here some enough! ;-) I plan to go back to the standard plugs the next time I work on it...
     
    grizquad likes this.
  8. Feb 14, 2018 at 11:42 AM
    #8
    nd4spdbh

    nd4spdbh Well-Known Member

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    any mods (tires lift etc). 16 in the city sounds about right.
     
  9. Feb 14, 2018 at 11:46 AM
    #9
    fredlyzone

    fredlyzone [OP] Member

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    Push Guard, Modified Skid Plate, Bug Deflector.
    It has stock sized tires and only an add-a-leaf in the back and 5150s. Pretty much stock suspension.
     
  10. Feb 14, 2018 at 11:47 AM
    #10
    taco2010trd

    taco2010trd Well-Known Member

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    Have you cleaned the MAF and throttle body?
     
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  11. Feb 14, 2018 at 11:48 AM
    #11
    fredlyzone

    fredlyzone [OP] Member

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    Not recently but that sounds like a great idea! What do you use to clean them?
     
  12. Feb 14, 2018 at 11:50 AM
    #12
    taco2010trd

    taco2010trd Well-Known Member

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    fredlyzone [OP] likes this.
  13. Feb 14, 2018 at 12:22 PM
    #13
    b_r_o

    b_r_o is going down hill

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    Is the check engine light on?
     
  14. Feb 14, 2018 at 12:24 PM
    #14
    Sandman614

    Sandman614 Travis #hotsavannahdotcom, LRGRNR

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    4-banger? If not switch to Denso or NGK stock plugs. Can try to run some Seafoam through the Gas tank and intake as instructed on the bottle.
     
    taco2010trd and b_r_o like this.
  15. Feb 14, 2018 at 12:34 PM
    #15
    fredlyzone

    fredlyzone [OP] Member

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    No, all is normal.
     
  16. Feb 14, 2018 at 12:34 PM
    #16
    taco2010trd

    taco2010trd Well-Known Member

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    Op keep us posted after you try those recommendations
     
  17. Feb 14, 2018 at 12:36 PM
    #17
    fredlyzone

    fredlyzone [OP] Member

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    Push Guard, Modified Skid Plate, Bug Deflector.
    It is the 6 cylinder Pre-Runner. I have added Lucas Upper Cylinder Lubrication & Injector Cleaner several tank fulls recently.
     
  18. Feb 14, 2018 at 12:40 PM
    #18
    Sandman614

    Sandman614 Travis #hotsavannahdotcom, LRGRNR

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    Are those the same tank fulls you are getting lower mileage on? You could have dirty O2 sensors from all that intake/injector cleaner. Best way to make any real diagnoses would be with an obdii reader and associated phone app/laptop.
     
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  19. Feb 14, 2018 at 12:43 PM
    #19
    fredlyzone

    fredlyzone [OP] Member

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    Push Guard, Modified Skid Plate, Bug Deflector.
    No, I usually run some of this every several months. I'll have to remove one of the O2 sensors and have a look but no codes are being reported.
     
  20. Feb 14, 2018 at 12:46 PM
    #20
    Sandman614

    Sandman614 Travis #hotsavannahdotcom, LRGRNR

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    Sensors don't always throw a code. Fuel trims as a "response" to O2 readings can be within a 20% swing and still not throw a code, but towards the boundaries can run rich/lean enough to drop mileage
     
    fredlyzone [OP] likes this.

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