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Terrible MPG's on 01 Taco

Discussion in '1st Gen. Tacomas (1995-2004)' started by bajaracer, Sep 16, 2008.

  1. Sep 16, 2008 at 8:51 PM
    #1
    bajaracer

    bajaracer [OP] Well-Known Member

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    I have an '01 Taco Dbl Cab 3.4 Prerunner and getting terrible MPG's Im guesstimating somewhere in the 10-12 range. I have done a couple of mods to help out but see no improvement. The mods are as follow: AEM Dry Brute force intake, free flow Magnaflow cats, URD 02 Sim, Flowmaster 50 series muffler. On the negatives i do have Fabtech 2 inch lift and am running 15x10's on 32x11.50 BFG's. Any suggestions as to what I can do to improve my MPG's? Oh, it has 96000 miles on the odo.
     
  2. Sep 16, 2008 at 8:57 PM
    #2
    tacomaman06

    tacomaman06 Carolina Alliance: Enforcer

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    getting there....
    here are a few things you can try and see if they help: new fuel filter, clean the throttle body, seafoam the motor, new spark plugs and wires, and make sure they air pressure in the tires is adjusted accordingly. all these will benefit you in geting some mileage back.
     
  3. Sep 16, 2008 at 10:37 PM
    #3
    350TacoZilla

    350TacoZilla Well-Known Member

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    dont forget oxygen sensors...those things can really suck the gas without effecting the engine light.... also hate to say it but your wheel/tire combo is probable not helping...10" wide rims are generally heavy..even aluminum ones..and a 11.50 offroad tire has alot of rolling resistance... a 33x10.50 or so on 15x8 wheel would help probably if you choose a closer to stock tread pattern
     
  4. Sep 19, 2008 at 10:11 AM
    #4
    Natedogg

    Natedogg Well-Known Member

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    This may be a long shot (hopefully it is for your sake), but my MPG went way down (~21 to ~16) when my tranny went. The mileage slowly decreased over months until one day braking hard into and then accelerating out of a turn the AT didn't shift.

    I have an '01 3.4L DC SR5 and it went at about 145k mi. Not sure if it's possible, but maybe do a transmission diagnostic?
     
  5. Sep 19, 2008 at 10:17 AM
    #5
    Ridgerunner

    Ridgerunner Well-Known Member

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    Yeah something is wrong there-mine gets around 20-22 hwy-of course I have no lift or bigger tires either
     
  6. Sep 19, 2008 at 10:46 AM
    #6
    Toy4Life

    Toy4Life 668: The Neighbor of the Beast

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    Definately a problem there. Good suggestions so far as well. The only thing I've heard that I personally wouldn't do, is Seafoam the engine. With 96000 miles on the motor, Seafoam could potentially cause more problems by flushing out residue that actually helps seal up the engine. Get some other opinions on that, as I am no proffessional.
     
  7. Sep 19, 2008 at 10:53 AM
    #7
    lsocoee

    lsocoee My hair is all natural Moderator

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    all good info. I'd add on an alignment if you notice any abnormal tire wear.

    like I'm going to trust you...what do you know about big tires? :p
     
  8. Sep 19, 2008 at 12:20 PM
    #8
    tacomaman06

    tacomaman06 Carolina Alliance: Enforcer

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    getting there....
    i agree about the seafoam part with high mileage as far as not adding it to the oil, but if you add it thru the brake booster line, which was what i was getting at, it will clean all the carbon deposits from the intake manifold and all............its not gonna hurt the motor this way.:)
     
  9. Sep 19, 2008 at 12:31 PM
    #9
    Toy4Life

    Toy4Life 668: The Neighbor of the Beast

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    You're right, Will, thanks for clarifying. Yeah, Seafoam is good stuff, just don't add it to the oil of a high mileage engine.
     
  10. Sep 19, 2008 at 12:34 PM
    #10
    tacomaman06

    tacomaman06 Carolina Alliance: Enforcer

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    getting there....
    yeah, if you do add it to the oil and the motor has some high miles on it......you take a chance on cleaning the seals too good and causing a leak(s), may not happen all the time, but why take the chance anyway.
     
  11. Sep 19, 2008 at 1:47 PM
    #11
    350TacoZilla

    350TacoZilla Well-Known Member

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    like I'm going to trust you...what do you know about big tires? :p[/QUOTE]

    well I certainly know how to kill the gas MPG on a toyota..stick a chevy motor in lol..
     
  12. May 16, 2010 at 5:54 PM
    #12
    3fitty

    3fitty Well-Known Member

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    I guess I'm a gambler because I Seafoamed my 01 at 160k. That was over a month ago and so far no leaks :) Didn't notice any difference though. Maybe +1 MPG.
     
  13. May 16, 2010 at 6:06 PM
    #13
    derekp

    derekp giddy up!

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    Will the fuel filter really make a significant difference? What is the replacement interval on it? With 123k, should I look at changing mine? I have an '01 also, but thankfully don't get that bad of mileage. You can see my average as well as single fuel-ups below.
     
  14. May 16, 2010 at 6:10 PM
    #14
    RelentlessFab

    RelentlessFab Tacoma offroad armor fabricating beast Vendor

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    Had tons on the old Taco's.... new Tundra is pretty stock
    Old thread, but cleaning the MAF sensor could help. It restored a bunch of power and a little gas mileage to my truck when I did it.
     
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