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Dont trust MTE on the UG.

Discussion in '1st Gen. Tacomas (1995-2004)' started by 01tacoprerunner, Sep 13, 2010.

  1. Sep 13, 2010 at 1:44 PM
    #1
    01tacoprerunner

    01tacoprerunner [OP] Lifted 'n Locked 4WD Prerunner

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    Ok so i have an ultragauge and it told me that i had like 30 miles to empty, and it said i had 1.5 gallons of gas in my tank, and I ran out of gas, lucky it was right before i was going to turn into my neighborhood so i walked and got a gas can, but still dont trust that shit, it really kinda pisses me off.:mad:
     
  2. Sep 13, 2010 at 1:46 PM
    #2
    blackhawke88

    blackhawke88 wo ai ni bao bei ^_^

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    im pretty sure on the instructions it even tells you not to trust it, at least my scangauge says to only use it as a reference
     
  3. Sep 13, 2010 at 1:47 PM
    #3
    01tacoprerunner

    01tacoprerunner [OP] Lifted 'n Locked 4WD Prerunner

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    Yea it probably does, but i didnt read the whole thing. its 44 pages. But i learned my lesson about it, and im glad i was close to home.
     
  4. Sep 13, 2010 at 1:48 PM
    #4
    gupster88

    gupster88 Well-Known Member

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    lmao i thought you were talking about something totally different when i read your title...but yea, sucks. id always go by what my avg miles on a tank is from me watching it. plus once the low fuel light comes on i find the next station asap
     
  5. Sep 13, 2010 at 1:50 PM
    #5
    blackhawke88

    blackhawke88 wo ai ni bao bei ^_^

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    me too actually :anonymous:
     
  6. Sep 13, 2010 at 1:50 PM
    #6
    MSUtacoboy

    MSUtacoboy Well-Known Member

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    my light comes on, i get gas. normally it only it takes 17 gallons. so i assume i have about 3.5 gallons before i run out. but i stilll don't trust that.
     
  7. Sep 13, 2010 at 1:51 PM
    #7
    01tacoprerunner

    01tacoprerunner [OP] Lifted 'n Locked 4WD Prerunner

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    Hahahaha:eek:
     
  8. Sep 13, 2010 at 1:51 PM
    #8
    gupster88

    gupster88 Well-Known Member

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    least i aint the only one with the mind in da gutter :cool:
     
  9. Sep 13, 2010 at 8:47 PM
    #9
    zero4

    zero4 Metal Cutter

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    As you know 1st gens don't have a fuel level sender so you have to enter in the fuel tank size as well as tell the UG when you fill up.

    What did you enter for fuel tank size, did you enter in what Toyota says it is? If yes, that's one of your issues right there.

    Did you reset the the average MPG trip when you filled up after you tiggered the full tank fill up?

    Best thing to do is run your tank as dry as possible. I'm pretty familiar with my fuel gauge so when I got to the point where I'm familiar with absolutely the lowest, I filled up. However much went into the tank on fill up is what I used to enter in the UG as my tank size. Toyota says my tank is 18.5, I normally average 17.5 on fill up & is what I entered in. Even if you run your tank bone dry to the point where you can't start the truck anymoe at any angle, it will still have fuel in it. So the tank size entered in the UG should be how much that's usable.

    At this point reset your trips & full tank fill up. For me, on weekdays when I drive fwy only, avg MPG will get in the 16, 17 range. Then the days where I know I will be driving street only I reset my average MPG. If I don't, even though the UG is supposed to recalculate it takes a while, I notice my average MPG will stay in the 16, 17 range. Upon reset it will go down to the 14 range for street driving.

    Using this practice, the DTE on the UG reads pretty close to what I get on a full tank & where I'm at half tank. Still don't rely on the UG for this but this way it's pretty close to what I average.

    Before doing this when I had 18.5 entered in it says I was expected to get 330 on a full tank. Yeah right, I can't even get 250 on a full tank.

    I got my buddy one & it was hooked up to a Ford (detected 57 gauges on CAN, I only get 33 on 9141) that did have a fuel sending sensor. The UG reads pretty close to what he normally gets on a full tank.

    It's not the UGs fault. I'm pissed that we don't have a fuel sending sensor. :annoyed:
     
  10. Sep 14, 2010 at 5:21 AM
    #10
    stucksucksnayota

    stucksucksnayota Well-Known Member

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    Thats crazy because I have drove mine probably 30 or so miles with the gas light on and with around 300 miles on a tank and my truck only holds 15.5 gallons.

    Haha I guess I have alot more gas left then I thought I did!
     
  11. Sep 14, 2010 at 5:23 AM
    #11
    rex99

    rex99 Well-Known Member

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  12. Sep 14, 2010 at 7:41 AM
    #12
    TanSR5x4

    TanSR5x4 Hold my beer and watch this

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    yeah mine has been giving me some outrageous numbers too but i know better than trust it lol im count myself pretty lucky to hit 300 with a full tank. now im definitely going to lower the tank level on there! great idea:D

    btw what manual or instructions are yall talkin about? cuz i didnt get anything like that in my little box
     
  13. Sep 14, 2010 at 7:48 AM
    #13
    Jetta1cab

    Jetta1cab Well-Known Member

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    Why don't you just fuel up again when you have 1/2 tank or 1/4 tank left on the fuel gauge? :confused: That's just a habit I've had since I started driving. I've never been stranded anywhere because I ran out of fuel.
     
  14. Sep 14, 2010 at 7:56 AM
    #14
    pudge151

    pudge151 Well-Known Member

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    didnt your low fuel light come on?
     
  15. Sep 14, 2010 at 7:58 AM
    #15
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    You realize that 1.5 gasl of fuel is only about 1" deep (if that) in the tank? Thats bad for the fuel pump.
     
  16. Sep 14, 2010 at 8:07 AM
    #16
    macgyver

    macgyver Well-Known Member

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    Myth. I have run all my vehicles down to fumes since I've been driving and never had a fuel pump fail on me.

    This was true in some 90's model chevys. But those are chevys so what do you expect.

    I usually drive about 20-30 miles when the light comes on and then fill up.
     
  17. Sep 14, 2010 at 8:07 AM
    #17
    STLTaco09

    STLTaco09 Well-Known Member

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    5100's all around, fronts at 1.75". TSB leaf pack + Toytec TSB AAL
    I also wouldn't trust it, and most certainly not before you calibrate the fuel levels. After you fill up, you can put in actual amount of fuel used (based off of the pump and how much was filled) in the fuel calibration. Doing this several times would make it more accurate. Still wouldn't trust it though.
     
  18. Sep 14, 2010 at 8:10 AM
    #18
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Im not convinced its a myth. I used to do this (run a few bucks in the tank, and keep the level low), and my fuel pump burned out. Same happened in my buddies Ford Mustang, and another friends Nissan Fronty.
     
  19. Sep 14, 2010 at 8:19 AM
    #19
    senna

    senna Well-Known Member

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    I am with you on this one, I think if the manufacture was worried about having enough fuel to cool the pump, they would have the light come on to encourage refueling early. Don't most of the tanks have containment (for lack of a better word) around the pump/pickup, to help pick up as much fuel as possible?
     
  20. Sep 14, 2010 at 8:25 AM
    #20
    TanSR5x4

    TanSR5x4 Hold my beer and watch this

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    happened to me once in my buick regal

    i dont think you can make just a broad statement saying its true or its not true since its happened to people before

    good way to find out is to keep doing it

    its your shit so you can do whatever you want with it
     
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