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Bad mpg

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Bmerr222, Mar 13, 2019 at 9:22 AM.

  1. Mar 13, 2019 at 10:10 AM
    #41
    Blue92

    Blue92 Well-Known Member

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    What brand of gas? I get crummy mileage at some stations (sheetz mainly) and great mileage at others (BP). Only 2-4 mpg difference though.
     
  2. Mar 13, 2019 at 10:14 AM
    #42
    Just Dandee

    Just Dandee Well-Known Member

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    Are you adjusting your odometer for the larger tire when doing your mpg calculations. With larger tires your odometer is understating distance travel. Recommend the fluid changes too- go to a good synthetic Redline- royal purple- amsoil. Help reduce the friction loss through the tranny, x case, diffs. Won’t move the needle much but when you fighting retain mpg it all begins to stack up to measurable improvements. Air pressure- replace that o2, clean the maf sensor, check the plugs again. Report back let’s us know if you got some improvements.
     
    Gunshot-6A likes this.
  3. Mar 13, 2019 at 11:26 AM
    #43
    KJP

    KJP Well-Known Member

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    OME, 4.56 gears, ARB front and rear, 265's, other stuff
    a lot of good suggestions here - I agree 7 MPG is a problem worth exploring. I get 10 pulling my travel trailer at 65. So, what I would do: jack the truck up and find if there are any drag issues on the brakes, check the MAF sensor, didn't catch it but have you checked your air filter?, run it by a code reader to see if anything is tripped but not lighting the CEL, remove your tires and borrow someone else's stock tires and see how the numbers compare (I doubt it's just the tires though, but a process of elimination), replace you O2 sensors. Take it for a long highway ride to see what numbers you get at steady speeds (eliminating the comments on jackrabbit city driving). Once those things are exhausted bring out the wallet and dig deeper, such as engine or tranny issues. Good luck!
     
  4. Mar 13, 2019 at 11:51 AM
    #44
    b_r_o

    b_r_o fresh cakes

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    WA
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    Is the check engine light on? Have you scanned it for codes?

    Cats can clog without setting codes. Just about any other sensor failure "should" set some kind of code

    A code reader with access to short/long term fuel trims would be helpful
     
    blu92in99, JaCado and desertrunner24 like this.
  5. Mar 13, 2019 at 12:41 PM
    #45
    steveo27

    steveo27 Ask me about my weiner

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    The same shit everyone else has.
    V6 6 speed 3” lift w/ 33’s and aftermarket wheels. I get 14ish mpg on winter gas.

    Something is drastically wrong with your vehicle or you drive like a dick
     
    desertrunner24 likes this.
  6. Mar 13, 2019 at 12:55 PM
    #46
    blackschwartz

    blackschwartz Member

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    first off your lift, the bigger tires, and you probably didn't rear gear the front and rear differentials. the reason I know this is because I have the same thing.

    What you can do to help is inflate the tires a little higher then you usually would but not enough to cause too much wear in the tires.
    swap out your 3.73 gears in both the front and rear differentials to a 4.56 or better yet 4.88.
    hope this helps!
     
  7. Mar 13, 2019 at 12:56 PM
    #47
    BillsSR5

    BillsSR5 Well-Known Member

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    o_O
     
    Newfiebruh and JaCado like this.
  8. Mar 13, 2019 at 12:57 PM
    #48
    Lester Lugnut

    Lester Lugnut Well-Known Member

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    I once has a 1974 Cadillac with a 500 cubic inch engine that got that exact mpg.
     
    b_r_o likes this.
  9. Mar 13, 2019 at 1:09 PM
    #49
    avw4x4

    avw4x4 Well-Known Member

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    ...loading....
    Dirty MAF?
     
    b_r_o likes this.
  10. Mar 13, 2019 at 1:10 PM
    #50
    JaCado

    JaCado Well-Known Member

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    My 71 mustang with the 351 Cleveland got about the same also.;)
     
    b_r_o likes this.
  11. Mar 13, 2019 at 1:17 PM
    #51
    steveo27

    steveo27 Ask me about my weiner

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    The same shit everyone else has.

    Even without regearing, the gas mileage shouldn’t be 7mpg. I’m on stock gears and get 14mpg as posted above.
     
  12. Mar 13, 2019 at 1:41 PM
    #52
    Larzzzz

    Larzzzz Grande' Ricardo

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    Aux back up lights, Bed lights, Re-located trailer plug, Good dooby, a.k.a. jumper cable mod, Heated seats, back up camera,
    What he said...
     
    JaCado likes this.
  13. Mar 13, 2019 at 1:43 PM
    #53
    Larzzzz

    Larzzzz Grande' Ricardo

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    Aux back up lights, Bed lights, Re-located trailer plug, Good dooby, a.k.a. jumper cable mod, Heated seats, back up camera,
    Pistons ftw.
     
    b_r_o and JaCado like this.
  14. Mar 13, 2019 at 8:23 PM
    #54
    Bmerr222

    Bmerr222 [OP] Member

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    Maf sensor is clean and no lights are on. Have a few things I’m gonna try. Can’t keep driving something that gets 7mpg. thanks everyone for the gel
     
  15. Mar 13, 2019 at 8:27 PM
    #55
    JaCado

    JaCado Well-Known Member

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    Have you done a sea foam treatment
     
  16. Mar 13, 2019 at 8:31 PM
    #56
    Bmerr222

    Bmerr222 [OP] Member

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  17. Mar 14, 2019 at 1:14 AM
    #57
    BKinzey

    BKinzey Well-Known Member

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    7mpg something is definitely wrong.

    There are a lot of "I get crappy mileage" posts that are "Pilot Error" but yours has merit. Keep slogging through the troll monkeys posting and somebody will have the answer.

    I'd guess brakes might be part of the problem but if they were dragging enough to cause a 50%+ reduction in mileage I'd think your wheels would catch fire in about 10 miles. :bananadead::bananadead:
     
    TacomaMike37 likes this.
  18. Mar 14, 2019 at 5:05 AM
    #58
    TacomaMike37

    TacomaMike37 Well-Known Member

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    Other person are you sure you are doing the math correctly when computing MPG ? 7mpg doesnt make sense. Do you have a 2000lbs of concrete in the bed, are you dragging dead bodies, are you sure all 4 wheels are still on the truck? All the other crap people are spewing, MAF, sea foam, blah blah, all a waste of time. You must have something seriously wrong with your truck to get single digits.
     
    Sprig likes this.
  19. Mar 14, 2019 at 5:20 AM
    #59
    Bmerr222

    Bmerr222 [OP] Member

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    4 inch lift,33/12.50r18, muffler delete,etc
    Yes I’m sure the math is right
     
  20. Mar 14, 2019 at 6:56 PM
    #60
    avw4x4

    avw4x4 Well-Known Member

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    ...loading....
    No big gay unicorn sticker weighing it down, right? Hear those things can do a number on a truck.
     

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