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What can be wrong!

Discussion in '4 Cylinder' started by silverback, Oct 22, 2011.

  1. Oct 22, 2011 at 1:22 PM
    #1
    silverback

    silverback [OP] Well-Known Member

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    Well i filled up my tank the other day and combination city and highway driving if my tank is 21 gallons im getting between 290 and 300 miles to the tank.

    Simple math = 14 mpg. WTF! on a 4 cylinder! I mean i put 17 inch wheels on instead of the 16 inch stealies and slightly larger AT tires but really? I might as well drive a full size v8. Any ideas on what to check before I trade this thing in. Can't have this with $3.80 gallon and especially a 4 banger.

    Its always been around this area. Even with the stock tires. Fyi i have noticed for some time what sounds like a slight exhaust leak when driving next to a wall along the road but I cant see anything when im under there.
     
  2. Oct 22, 2011 at 2:12 PM
    #2
    TacomaBuzz

    TacomaBuzz Well-Known Member

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    Something is way off, I've been getting a consistent 25+ Mpg. AndrewFalk gets around 26-27 Mpg. Do you need a tune-up? I would go back to stock tires/rims if gas mileage is important and consider getting a base 2.7L Tacoma. You are carrying around extra weight and drag due to having the same suspension and height as the 4x4's.
     
  3. Oct 22, 2011 at 2:17 PM
    #3
    friction

    friction Well-Known Member

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    Wait. Are you actually figuring based on a trip reading or are you assuming the "E" line is the full 21 gallons? Even when the gas light comes on we have around 4 (or more) gallons left...
     
  4. Oct 22, 2011 at 2:18 PM
    #4
    Yoytoda

    Yoytoda The Little Truck That Could

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    Roland
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    you cant divide the size of the tank by the miles... you have to divide the miles by how many gallons you put in...


    21 gallons is the entire tank. usually i only put in 17 gallons when the light comes on and get 350 miles which is about 20mpg average



    there is not much difference in the mileage of a base and a prerunner. the 4.10 gearing in a prerunner compensates for the tire size and height.
     
  5. Oct 22, 2011 at 3:58 PM
    #5
    silverback

    silverback [OP] Well-Known Member

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    Ill give it another shot. But I know its pretty darn low. Id except 20mpg.
     
  6. Oct 22, 2011 at 4:01 PM
    #6
    silverback

    silverback [OP] Well-Known Member

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    Ive got 72k miles. Bought with 53k. Maybe ill try a tuneup. Already replaced the plugs and the air filter and just changed the oil last week. Ill take it in let them run it and see.
     
  7. Oct 22, 2011 at 7:46 PM
    #7
    mech160

    mech160 Well-Known Member

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    Top off tank and "zero" the trip meter. Next time you fill, top off tank again and note both mileage on trip meter along with amount of gallons it took to top off. (I usually fill until gas pump handle automatically shuts off, and then slowly squeeze handle again until it shuts off again) Divide trip mileage by gallons added; you don't have to wait until you are close to empty or even half. 125 miles divided by 5 gallons = 25 mpg
     
  8. Oct 22, 2011 at 8:51 PM
    #8
    AndrewFalk

    AndrewFalk Science!

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    :)
    Winner. ;)
     
  9. Oct 22, 2011 at 8:56 PM
    #9
    Yoytoda

    Yoytoda The Little Truck That Could

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    but you know what they say about assuming. when you assume it makes an
    ASS of U and ME

    for all we know he fills up when he hits 1/4 tank. :notsure:
     
  10. Oct 22, 2011 at 9:02 PM
    #10
    AndrewFalk

    AndrewFalk Science!

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    :)
    300 * (6.02 x 10^23) :p
     
  11. Oct 22, 2011 at 9:27 PM
    #11
    Yoytoda

    Yoytoda The Little Truck That Could

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    thats pretty ignorant to say...

    if you are getting 10mpg are you gonna say eh fuck it its a truck or would you be concerned?

    its a good idea to keep track of mpgs to make sure your truck is running right. its also not women like to want the best mileage we can get...


    Edit: if you dont care about mpgs you shoulda bought a 1 ton dodge with a hemi
     
  12. Oct 26, 2011 at 12:59 AM
    #12
    4Wheelin4Banger

    4Wheelin4Banger Supercharged Toyman

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    What can be wrong?
    Operator error
     
  13. Oct 27, 2011 at 11:15 AM
    #13
    silverback

    silverback [OP] Well-Known Member

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    Jesus your right my truck is so severely modified I should have though twice about posting. I guess running 275 vs 265 is intense.
     
  14. Oct 27, 2011 at 11:18 AM
    #14
    silverback

    silverback [OP] Well-Known Member

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    lead foot? Ill accept that answer.
     
  15. Oct 27, 2011 at 11:20 AM
    #15
    friction

    friction Well-Known Member

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    Seriously, are you calculating it correctly? Look at a few of the first posts...reset the trip when you top off the tank, and divide the trip by the number of gallons you refill with.
     
  16. Oct 27, 2011 at 11:21 AM
    #16
    Brunes

    Brunes abides.

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    It does change the calculation...
     
  17. Oct 27, 2011 at 5:25 PM
    #17
    silverback

    silverback [OP] Well-Known Member

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    I did but it takes time to drive the tank down my friend. Im almost there!
     
  18. Oct 27, 2011 at 5:28 PM
    #18
    silverback

    silverback [OP] Well-Known Member

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    I imagine, thats why ill give up a few for the curve.
     
  19. Nov 29, 2011 at 2:01 AM
    #19
    Stout890

    Stout890 Well-Known Member

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    iv been getting 14mpg to the tank with my 3rz also....i cant figure it out.
    im running 31" tires and 15" wheels. and iv always thought it sounded like i have an exhaust leak also. im almost done with this tank, so when i fill up ill calculate again.
     
  20. Nov 29, 2011 at 6:55 AM
    #20
    saugus

    saugus Well-Known Member

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    Are you zeroing out at the point when you fill up while filling to the point when the pump stops (no topping) and then repeating that process on the next fill up while taking the mileage and dividing by the number of gallons and then multiplying that number by ~1.148 to account for 31" (> 2" radius)?
     

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