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major MPG drop all of a sudden

Discussion in '2nd Gen. Tacomas (2005-2015)' started by tammikm, Jan 3, 2011.

  1. Jan 3, 2011 at 6:47 PM
    #1
    tammikm

    tammikm [OP] Well-Known Member

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    what would cause my MPG's to drop off all of a sudden? 2006 DC 4x4 SR5, was getting approx 22-24 mpg, now am getting 15 - 16 mpg... seems to run the same but is using way more gas....anyone else have this problem?

    thanks
     
  2. Jan 3, 2011 at 6:49 PM
    #2
    Matic

    Matic Locked and Lifted "02" DC TRD.

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    No warning lites on the dash?
    I would look at 02 sensors first. Could be going bad and dumping more fuel into the system.
     
  3. Jan 3, 2011 at 7:05 PM
    #3
    hendooman

    hendooman The Stroker Ace

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    Your fuelly sig says 19 mpg, so at 16 you are not as far off as you think. Either way you are not giving us enough info to give ideas. At 3 mpg off normal, could be a batch of bad gas, have you been in 4wd a lot lately, towing anything, fuel filter, could be a whole host of things....
     
  4. Jan 3, 2011 at 7:09 PM
    #4
    toyotatacomaTRD

    toyotatacomaTRD Senior Member

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    Are you using 4wd alot? It kills my mileage...
     
  5. Jan 3, 2011 at 7:09 PM
    #5
    ktmrider

    ktmrider Senior Member

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  6. Jan 3, 2011 at 7:13 PM
    #6
    malander

    malander That's some tight butthole

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    x2 i went from 22 to 15 mpg after a few times using 4wd. I would imagine cold start up temps, low tire pressure due to cold, and winter gas but were you getting good mileage before winter hit?
     
  7. Jan 3, 2011 at 7:13 PM
    #7
    OZ-T

    OZ-T Quite an experience to live in fear , isn't it ?

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    Winter gas blend .... in Canada ...... in the winter

    4x4 all the time doesn't help either
     
  8. Jan 3, 2011 at 7:16 PM
    #8
    lookylookitzadam

    lookylookitzadam Retrofit Club!

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    Eat to much over the holidays? =P

    Probably some bad gas unless its consistent, then I would guess o2 sensors are screwing with your mix.
     
  9. Jan 3, 2011 at 8:59 PM
    #9
    2_wheels

    2_wheels Well-Known Member

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    Could it possibly be that you converted KM vs. MILES? I noticed that you're from Canada and just a thought.
    Think about it, 15 Miles = 24.14 Kilometers. Possibility? No disrespect here, I'm merely throwing something out for you. If you really get 24 mpg I want to swap out my US ECU for a CAN ECU!

    I've got the same truck, live in Nevada and the absolute best tank of gas was purchased in Salem Oregon and I got 17.5 MPG on the highway with 2 motorcycles in the back. Turns out it was summer and the refinery was at the same station I bought the gas so I'm thinking it was the "fresh" batch. Typically in the winter I get 15.5 to 16 mpg.
    Happy New Year all!
     
  10. Jan 3, 2011 at 10:48 PM
    #10
    kessler89

    kessler89 Well-Known Member

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    i'm getting 14-15 on a fresh tune up, tons of air in my tires, and driving like a 89yr old grandma, winter gas sucks and my aerodynamics suck
     
  11. Jan 3, 2011 at 11:30 PM
    #11
    Taco11

    Taco11 Well-Known Member

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    Started using defrost all the time? Winter gas? 4x4? All could contribute.
     
  12. Jan 4, 2011 at 7:16 AM
    #12
    tammikm

    tammikm [OP] Well-Known Member

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    ya, thanks guys, I'm chalking it up to winter, winter gas, defrost, etc, not in 4x4 much as the roads have been clear... but i suspect its just due to winter...
     
  13. Jan 4, 2011 at 7:37 AM
    #13
    Zombie Runner

    Zombie Runner Are these black helicopters for me?

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    yea the defroster wont help either since it uses the compressor
     
  14. Jan 4, 2011 at 7:55 AM
    #14
    KenpachiZaraki

    KenpachiZaraki Its Wicked Flow BITCHES!!

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    U know what i have been getting shitty milage too, I actually went through my truck yest and chrcked diff oiks, spark plug gaps, clean maf sensor, grease u joints ckean filter, I was scully thinking of changing o2 sen and getting a maf sensor. Hmmm maybe its time to invest in a maf, so ut can help my milage, just don't tell the wifey!! :laugh:
     
  15. Jan 4, 2011 at 8:04 AM
    #15
    ItalynStylion

    ItalynStylion Sounds Gooooood

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    Sounds like you've been letting the truck warm up before you get in and take off. My money is on the gas burnt up idling.
     
  16. Jan 4, 2011 at 8:07 AM
    #16
    BrokenTusk

    BrokenTusk I support a velociraptor free workplace.

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    Check Build Thread!!

    Defrost?
     
  17. Jan 4, 2011 at 8:53 AM
    #17
    kessler89

    kessler89 Well-Known Member

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    That's why you should do the diy mod to eliminate this, one of the best things I've done to my truck
     
  18. Jan 4, 2011 at 9:06 AM
    #18
    Pugga

    Pugga Pasti-Dip Free 1983 - 2015... It was a good run

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    I thought the compressor was only running if you're on defrost and you have the A/C switch lit up? :confused:
     
  19. Jan 4, 2011 at 11:29 AM
    #19
    KenpachiZaraki

    KenpachiZaraki Its Wicked Flow BITCHES!!

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    Nope, if u use defrost, u use ac, but the ac light won't be on
     
  20. Jan 4, 2011 at 11:42 AM
    #20
    wiscdave

    wiscdave Lets Do It!

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    your right in the ballpark for mpg in the winter...these truck run rich as PIGS
     
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