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4 cyl 1st gen bad gas mileage

Discussion in '1st Gen. Tacomas (1995-2004)' started by futuretacoowner, May 13, 2013.

  1. May 13, 2013 at 9:11 AM
    #1
    futuretacoowner

    futuretacoowner [OP] Well-Known Member

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    Andrew
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    Hey guys, there probably is already a thread on this but here it goes anyway.

    I seem to get really bad gas mileage with my 1st gen 4cyl 2.7l engine I am running at around 5.1km/l which is around 12mpg. I think I should be running around 20 mpg or 8.1km/l. Anyone else having this problem? anything I can do better, to the truck itself, not my driving, that could help ? I will start driving like an old man to see if it will help anyways. any help would be appreciated!!
     
  2. May 13, 2013 at 10:17 AM
    #2
    Madjik_Man

    Madjik_Man The Rembrandt of Rattle Can

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    Boulder, CO
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    1998 Ext Cab 4x4 TRD 5MT sunfire red pearl
    About 25 pounds of spray paint and vinyl dye
    What size tires?

    Topper?

    Empty bed? Tailgate up/down?

    When's the last time the spark plugs and spark plug wires were changed? When's the last time the throttle body was thoroughly cleaned? When's the last time the MAF was cleaned? When's the last time the fuel filter was changed? Engine air filter also?
     
  3. May 13, 2013 at 10:36 AM
    #3
    gainman

    gainman Well-Known Member

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    Has it always been like this or did it recently change?
     
  4. May 13, 2013 at 11:08 AM
    #4
    futuretacoowner

    futuretacoowner [OP] Well-Known Member

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    265s

    no topper
    empty bed other than spare tire, tailgate up .
    havent changed spark plugs since since I got it, air filter was change last summer, havent changed fuel filter.

    it seems to be like this since I got it, maybe has been getting a little worse.
     
  5. May 13, 2013 at 11:48 AM
    #5
    Madjik_Man

    Madjik_Man The Rembrandt of Rattle Can

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    About 25 pounds of spray paint and vinyl dye
    The spare tire in the bed is definitely messing with your fuel economy but, IMO, not enough for the discrepancy.

    I would do the simple, and relatively cheap, things like change the plugs, wires, clean the MAF, take the throttle body off and thoroughly clean it (and while you're at it clean the IACV).... all of those could have negative effects on your fuel economy.

    The fuel filter on the 2.7 is a PITA if I recall some of the stories, but it might be worth it too.
     
  6. May 13, 2013 at 1:27 PM
    #6
    4banger4x4

    4banger4x4 Probably should'nt have done that.

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    Fule filter is a Major PITA its under the intake manifold. but change plugs and clean the MAF with some cleaner (brake parts cleaner, carb cleaner, electrical cleaner, or MAF cleaner) but also you need to check what gears you have, I have a 2.7 5spd with 31s and i only pull 16 mpgs because i have 3.58 gear ratios.
     
  7. May 13, 2013 at 8:43 PM
    #7
    Loggerhead

    Loggerhead Well-Known Member

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    Alaska
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    Still mostly stock . . .
    Eroded gap on plugs, old plug wires, dirty MAF, dirty air filter, dirty throttle body butterfly and IAC valve, old and faulty o2 sensors, vacuum leaks or plugged cat can all contribute to poor fuel economy . . .
     
  8. May 13, 2013 at 9:30 PM
    #8
    tan4x4

    tan4x4 Well-Known Member

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    Bilsteins, OME 881's, 3-leaf AAL, Detroit TruTrac, 31" tires, Michelin LTX AT2, stock gears, Tranny skidplate, TC skidplate, CBI rear bumper, sliders, UltraGauge, PowerTank, CB
    I'm getting 19-23 miles per American gallon. There is something definitely wrong with yours. Start with a thorough tuneup (plugs, wires, PCV, oil/filter, etc). Also, lube the drive line.

    You may want to check the valve lash. Hard to adjust, but you can at least check to see if they need adjustment.
     
  9. May 14, 2013 at 5:09 AM
    #9
    futuretacoowner

    futuretacoowner [OP] Well-Known Member

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    Thanks guys!!
     
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