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Low Fuel Warning Light Question.

Discussion in '2nd Gen. Tacomas (2005-2015)' started by GuapOh, Jun 12, 2011.

  1. Jun 12, 2011 at 2:35 PM
    #1
    GuapOh

    GuapOh [OP] Well-Known Member

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    My low fuel light has consistently come on when I have burned 16 of the 21 gallons in the tank. In every other vehicle I've ever owned, they came on when the tank had only 1 or maybe 2 which is what I prefer.

    My gas gauge seems to stay above full for the first 80-100 miles then it goes down rapidly but what is consistent is that with 5 gallons still in the tank, the light comes on. Anyone else have similar results?
     
  2. Jun 12, 2011 at 2:37 PM
    #2
    sambojee

    sambojee Well-Known Member

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    Acually i have noticed the same thing, i wouldnt worry about
     
  3. Jun 12, 2011 at 2:38 PM
    #3
    rmb_crew

    rmb_crew My other ride has 18,400HP!!!!!!

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    Totally normal. All tacomas do that. I tried adjusting mine when i did my gauge colors but no luck.
     
  4. Jun 12, 2011 at 2:42 PM
    #4
    BradleyScottETC

    BradleyScottETC Class IV Category 8 Elite VIP Member (Only)

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    I think it's because the fuel pump is inherently designed to be cooled by the fuel in the tank, therefor if you drive your vehicle with less than 16 gallons in the tank, the fuel pump is subject to running hotter than designed, and thus lessen it's lifespan.
     
  5. Jun 12, 2011 at 5:47 PM
    #5
    Gregg

    Gregg Well-Known Member

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    Normal. Mine does the same thing. When I first got it I thought I was going to get 400 miles to the tank after getting over 100 on the first quarter. Wrong! After the first quarter it falls rapidly. Also the low fuel light comes on at about 16 gallons.
     
  6. Jun 12, 2011 at 8:39 PM
    #6
    David K

    David K Well-Known Member

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    Actually, the light comes on when you have burned 17 gallons (+/- 0.5 gal.)... If you guys are topping off the tank when you 'fill-up'.

    Several threads on the subject... Here is what most of us have observed:


    So far, the 21 gallon tank has (+/- 0.5 gallon):

    16 gallons at the 3/4 full gauge line (down 5 gallons)
    12 gallons at the 1/2 full gauge line (down 9)
    8 gallons at the 1/4 tank line. (down 13)
    4 gallons at the E-LIGHT (down 17)
    3 gallons at the E LINE (down 18)

    E line to an empty tank is 3 gallons ('reserve').
     
  7. Jun 13, 2011 at 10:25 PM
    #7
    GuapOh

    GuapOh [OP] Well-Known Member

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    :thumbsup: Okay. Thanks. I will not worry about it any more.
     
  8. Jun 13, 2011 at 10:28 PM
    #8
    808matt

    808matt Well-Known Member

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    you can always remove that annoying light bulb
     
  9. Jun 13, 2011 at 10:36 PM
    #9
    babytruck

    babytruck Babytruck, babytruck...I've got a babytruck :)

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    Good to know, thank you David. :)
     
  10. Jun 14, 2011 at 8:46 AM
    #10
    patpatpat

    patpatpat Well-Known Member

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    I noticed that same gallons at each mark as well with my 4 cyl.
     
  11. Jun 14, 2011 at 8:53 AM
    #11
    macgyver

    macgyver Well-Known Member

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    Not necessarily true. That's kind of an "old wives tale." The only time I have heard of failures such as this were in some 90's model Chevy's. I always run my vehicles down about 25-30 miles with the light on. I have never had a fuel pump failure, even when i was running a Walbro 255lph pump in my turbo accord I used to own. My last accord had over 200k miles on it when I sold it. 91k Miles on the Tacoma now...no fuel pump issues.
     
  12. Jun 14, 2011 at 8:58 AM
    #12
    aficianado

    aficianado Well-Known Member

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    i fill up anywhere between 1/4 to 1/2. it makes me "feel" like i am spending less $$ on fuel.

    stupid mental games i need to play on myself.
     
  13. Jun 14, 2011 at 9:01 AM
    #13
    macgyver

    macgyver Well-Known Member

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    If I did that, I would be filling up every other day. I fill up about once every 4 days.
     
  14. Jun 14, 2011 at 9:58 AM
    #14
    David K

    David K Well-Known Member

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    De nada!

    As you can see, we have the most gallons in the first 1/4 tank (5) and the last 1/4 tank (8)... and just 4 gallons from 3/4 to 1/2 and again from 1/2 to 1/4 tank lines.


    This is why the needle seems to move faster after the first 1/4 tank is burned... it does! At 16 mpg, you go 80 miles to the 3/4 line from full but it is only 64 miles from there to the 1/2 tank line.

    Hopefully none of us go to where we run out of gas, but from the 1/4 full line to an empty tank is 128 miles (8 gallons x 16 mpg).
     
  15. Jun 14, 2011 at 11:24 AM
    #15
    dan0

    dan0 Well-Known Member

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    drove a ranger for 16 years always ran it to empty (18+ to fill) the fuel pump was the only thing i never had a problem with

    my tacoma I usually run to E 19 gal fill-up, put 20 in it once
    http://www.fuelly.com/driver/dan0h/tacoma/log
     
  16. Jun 14, 2011 at 8:38 PM
    #16
    travelingman

    travelingman What would Scooby do?

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    Why?
     
  17. Jun 15, 2011 at 7:43 AM
    #17
    dan0

    dan0 Well-Known Member

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    why not ?
     
  18. Jun 15, 2011 at 10:45 AM
    #18
    skytower

    skytower Well-Known Member

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    Ran it to E, or ran it dry? Fuel pumps are cooled by fuel. E on the gauge still leaves a few gallons in the tank, which allows for fuel pump cooling during most driving conditions.
    Running it to E is just asking for trouble. Sometimes it's unavoidable, but you're not leaving any room for error.
     
  19. Jun 15, 2011 at 10:49 AM
    #19
    TnRedNeck721

    TnRedNeck721 GO VOLS!

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    did not read all the comments. but i have put almost 17 in and i still did not have got the light. and put almost 18 and the light was on. i have DCSB
     
  20. Jun 15, 2011 at 10:54 AM
    #20
    Racerboy221

    Racerboy221 Well-Known Member

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    I replaced my standard 1st gen gauges recently with SR5 which had a tach and noticed a difference in the fuel gauge position as well.

    Previously, it would run about 100 miles buy the 1st quarter tank and run better than 80 after it hit the E. Everyone who ever rode with me used to panic when they saw just how long we would go before getting fuel.

    Now, with the new cluster installed, I get 100 miles before it comes down to the F.....then it runs out within 10 miles from hitting E. The truck was suppesidly not equipped with a Low Fuel sensor but funny thing....when I installed the new gauges, the one in the cluster now works!!! So there must have been one in the wring harness all along??
     
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