1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Bad mpg's

Discussion in 'Performance and Tuning' started by Honey badger, Aug 10, 2011.

  1. Aug 10, 2011 at 2:09 PM
    #1
    Honey badger

    Honey badger [OP] Honey badger hits whatever tree he wants to hit!!

    Joined:
    Oct 22, 2009
    Member:
    #24735
    Messages:
    2,197
    Gender:
    Male
    First Name:
    Bon
    Kinder, Louisiana
    Vehicle:
    02 DC BLACK 3.4
    Last week I change my plugs, put in an OEM air filter, changed my fuel filter, and seafoamed. With my lift and tires going about 70 mph to and from work I would get about 15.5-16 mpg's now my scanguage is showing about 14 mpg's and when I checked it last I only got about 14.5 average. Anyone have any ideas as to what is going on? Also I have a low idle with it in gear and stopped it is around 500 rpm's any help?
     
  2. Aug 10, 2011 at 2:14 PM
    #2
    Honey badger

    Honey badger [OP] Honey badger hits whatever tree he wants to hit!!

    Joined:
    Oct 22, 2009
    Member:
    #24735
    Messages:
    2,197
    Gender:
    Male
    First Name:
    Bon
    Kinder, Louisiana
    Vehicle:
    02 DC BLACK 3.4
    I wish I got that. But you have stock tires and no lift lol a good reason why you get 21. I have not noticed that I am driving differently it is all highway to and from so steadt 65-70 mph all the way. I know that is not the best speed to go when trying to get better mpg's.
     
  3. Aug 10, 2011 at 2:20 PM
    #3
    Honey badger

    Honey badger [OP] Honey badger hits whatever tree he wants to hit!!

    Joined:
    Oct 22, 2009
    Member:
    #24735
    Messages:
    2,197
    Gender:
    Male
    First Name:
    Bon
    Kinder, Louisiana
    Vehicle:
    02 DC BLACK 3.4
    Yea me being 4x4 is not helping lol at all but before I could get 16 out of it. My tires are 305/70/16 I think that is about a 33-12.5
     
  4. Aug 10, 2011 at 2:31 PM
    #4
    Rhino

    Rhino Well-Known Member

    Joined:
    Apr 25, 2011
    Member:
    #55529
    Messages:
    279
    Gender:
    Male
    First Name:
    Ryan
    Laurel, Mississippi
    Vehicle:
    03 TRD SR5 4x4
    gray wire mod, blacked out, debadged, toolbox foglights, cb in dash, system, bilstein 5100's in front wrapped in eibach coils, 5125's in the rear with 2 inch aal and 1 inch shackle, diff drop kit, extended rear brake line, 8000 lb smittybuilt winch on a custom winch bumper, 2 4 inch 100 watt kc's and 2 6 inch 100 watt kc's on the bumper, sometimes a ladder rack,much more to come
    have you had your 02 sensors checked?
     
  5. Aug 10, 2011 at 2:34 PM
    #5
    Texoma

    Texoma Well-Known Member

    Joined:
    Feb 1, 2011
    Member:
    #50374
    Messages:
    3,872
    Gender:
    Male
    First Name:
    Chris(Topher)
    Lago Vista, TX
    Vehicle:
    10 Taco 4x4
    Poweraid TB spacer, a bunch a cool stickers, a bada ass MetalMiller Tx Longhorns grill emblem painted Hemi Orange, JBA 2035s headers and dey are perty, Diff breather mod, Red LED interior lights, Fancy head unit that plays ipod n movies, Also DIY install factory stuff like, factory cruise control, factory intermittent wipers, OME nitro struts with 886x springs and toy tec top plate, LR UCA's for better alignmnet and dey beefier too, Old Man Emu Dakar leaf springs in da rear with the gear, U bolt flipper, 5 factory 16" steels wit Pep Boys special Dakota Definity MT's in 285/75/16, some bad ass weather tech floor liners so I don't muck up my interior, an ATO shackle flipper for mo travel in da rear wit the gear, also super shiny Fox 2.0 shocks back there too, all sorts of steal armor for bouncing off of the rocks like demello sliders, AP front skid, trans skid, n transfer skid, demello gas tank skid, and a tough as nails ARB bumper with warn 8k winch, I'm sure there's more but it's alre

    How you check an o2 sensor?
     
  6. Aug 10, 2011 at 2:34 PM
    #6
    Honey badger

    Honey badger [OP] Honey badger hits whatever tree he wants to hit!!

    Joined:
    Oct 22, 2009
    Member:
    #24735
    Messages:
    2,197
    Gender:
    Male
    First Name:
    Bon
    Kinder, Louisiana
    Vehicle:
    02 DC BLACK 3.4
    No I have not. How do I have them checked?
     
  7. Aug 10, 2011 at 2:42 PM
    #7
    David K

    David K Well-Known Member

    Joined:
    Jun 27, 2009
    Member:
    #18969
    Messages:
    8,827
    Gender:
    Male
    San Marcos, Alta California
    Vehicle:
    2010 4WD Off Road DC
    Differential Breather Mod Light Bar: 2 Hella 4000 HID, 1 Kragen HID, 1 Cibie Halogen.
    Check your air pressure! Raise it closer to the tire's max... 32 if stock BFG's (a 35 psi tire).

    My mileage was below 16 mpg recently, and while I am usually good at checking the pressure... it was after our last Baja trip when I did... and perhaps due to hot air when I set them at 35 psi, but when I checked this weekend it was down to 30 psi... The Hankooks are a 44 psi max. tire and I found 35-40 to be ideal. I put the fronts at 38 and the backs at 40 and I got 17.4 mpg last fill up (was mostly freeway driving).
     
  8. Aug 10, 2011 at 2:45 PM
    #8
    Honey badger

    Honey badger [OP] Honey badger hits whatever tree he wants to hit!!

    Joined:
    Oct 22, 2009
    Member:
    #24735
    Messages:
    2,197
    Gender:
    Male
    First Name:
    Bon
    Kinder, Louisiana
    Vehicle:
    02 DC BLACK 3.4
    I think the max on my tires are 50 psi I have Mickey Thompson Baja MTZ's I run about 36 in them.
     
  9. Aug 10, 2011 at 2:48 PM
    #9
    SupraT

    SupraT Tacoma Lover

    Joined:
    Feb 26, 2010
    Member:
    #32148
    Messages:
    2,471
    Gender:
    Male
    First Name:
    Tony
    Columbia Falls
    Vehicle:
    98 TRD SR5 4x4
    3" Lift Three leaf add and Bilstin 5100"s in back and Donahoe coilovers in front, Tinted Windows, Blackened parking light, tinted brake lights, clear bumper lights, Blacked out turn signals, AVS vent visors, Electric Fan mod, K&N CAI
    Sorry to thread jack but I got 20mpg last weekend , highway miles but still good:eek:
     
  10. Aug 10, 2011 at 2:49 PM
    #10
    Texoma

    Texoma Well-Known Member

    Joined:
    Feb 1, 2011
    Member:
    #50374
    Messages:
    3,872
    Gender:
    Male
    First Name:
    Chris(Topher)
    Lago Vista, TX
    Vehicle:
    10 Taco 4x4
    Poweraid TB spacer, a bunch a cool stickers, a bada ass MetalMiller Tx Longhorns grill emblem painted Hemi Orange, JBA 2035s headers and dey are perty, Diff breather mod, Red LED interior lights, Fancy head unit that plays ipod n movies, Also DIY install factory stuff like, factory cruise control, factory intermittent wipers, OME nitro struts with 886x springs and toy tec top plate, LR UCA's for better alignmnet and dey beefier too, Old Man Emu Dakar leaf springs in da rear with the gear, U bolt flipper, 5 factory 16" steels wit Pep Boys special Dakota Definity MT's in 285/75/16, some bad ass weather tech floor liners so I don't muck up my interior, an ATO shackle flipper for mo travel in da rear wit the gear, also super shiny Fox 2.0 shocks back there too, all sorts of steal armor for bouncing off of the rocks like demello sliders, AP front skid, trans skid, n transfer skid, demello gas tank skid, and a tough as nails ARB bumper with warn 8k winch, I'm sure there's more but it's alre
    Good for gas mileage, but bad for tire wear. The middles of the tires will wear much more quickly than the rest of the tire. Also you will get less traction doing that, especially wet traction. You will hydroplane much easier. Best way to set tire pressure is the chalk test. If they are underinflated you will get less gas mileage and outside of tires will wear more, overinflation, see first two sentences of paragraph.
     
  11. Aug 10, 2011 at 2:51 PM
    #11
    Honey badger

    Honey badger [OP] Honey badger hits whatever tree he wants to hit!!

    Joined:
    Oct 22, 2009
    Member:
    #24735
    Messages:
    2,197
    Gender:
    Male
    First Name:
    Bon
    Kinder, Louisiana
    Vehicle:
    02 DC BLACK 3.4
    :brianr:
     
  12. Aug 10, 2011 at 2:53 PM
    #12
    Stubbs95tacoma

    Stubbs95tacoma Well-Known Member

    Joined:
    Dec 12, 2010
    Member:
    #47604
    Messages:
    3,303
    Gender:
    Male
    First Name:
    Blake
    Wichita
    Vehicle:
    07 SR5
    6 Inch Lift
    i get 9... like a boss :D
     
  13. Aug 10, 2011 at 2:55 PM
    #13
    prerunner32

    prerunner32 TRD

    Joined:
    Jul 16, 2011
    Member:
    #59991
    Messages:
    176
    Gender:
    Male
    First Name:
    Alan
    Foothill Ranch
    Vehicle:
    05 Prerunner TRD Sport Longbed
    285/70/17 BFG A/T's, 17in Method Double Standard Wheels, Camburg 2.5 Coilovers, Alpine Head Unit, Infinity Speakers, 10" JL Audio Sub, 2 Rockford Fosgate Amps, AFe Stage 2 Si (Oiled)
    Yea Im way stoked. I got 21.1 (Stock wheels and tires though) City/Highway 50/50. Super excited to see those numbers out of a Double Cab long bed.

    Op, have you had your odometer recalibrated? Also yea, check tire preasure.
     
  14. Aug 10, 2011 at 2:58 PM
    #14
    Honey badger

    Honey badger [OP] Honey badger hits whatever tree he wants to hit!!

    Joined:
    Oct 22, 2009
    Member:
    #24735
    Messages:
    2,197
    Gender:
    Male
    First Name:
    Bon
    Kinder, Louisiana
    Vehicle:
    02 DC BLACK 3.4
    Nope have done nothing with the odometer and since I am at work now don't have a chance to check the pressure. As soon as I get home I will though and then look into having my 02 sensors looked at.
     
  15. Aug 10, 2011 at 3:00 PM
    #15
    David K

    David K Well-Known Member

    Joined:
    Jun 27, 2009
    Member:
    #18969
    Messages:
    8,827
    Gender:
    Male
    San Marcos, Alta California
    Vehicle:
    2010 4WD Off Road DC
    Differential Breather Mod Light Bar: 2 Hella 4000 HID, 1 Kragen HID, 1 Cibie Halogen.
    Not true on all tires... as I said "close to the max. rating" The chalk test will tell if your wear is even or not.

    My Dynapros at 40 psi are wearing EVEN at 8,000+ miles (they were rotated at 5,000 miles). They are 44 psi tires.

    I am not saying to go to or above the max. tire rating (it is on the sidewall)... but close vs. under-inflated.
     
  16. Aug 10, 2011 at 3:03 PM
    #16
    Honey badger

    Honey badger [OP] Honey badger hits whatever tree he wants to hit!!

    Joined:
    Oct 22, 2009
    Member:
    #24735
    Messages:
    2,197
    Gender:
    Male
    First Name:
    Bon
    Kinder, Louisiana
    Vehicle:
    02 DC BLACK 3.4
    I feel that with running about 36-38 psi has done me good. I get good mpg's and tire wear is good also. I have around 40,000 miles in these tires and still so much tread left. I may be low on the pressure in them and that may be why I am getting worse mpg's it is just funny since I did the work to my truck that I then noticed it.
     
  17. Aug 10, 2011 at 3:03 PM
    #17
    Texoma

    Texoma Well-Known Member

    Joined:
    Feb 1, 2011
    Member:
    #50374
    Messages:
    3,872
    Gender:
    Male
    First Name:
    Chris(Topher)
    Lago Vista, TX
    Vehicle:
    10 Taco 4x4
    Poweraid TB spacer, a bunch a cool stickers, a bada ass MetalMiller Tx Longhorns grill emblem painted Hemi Orange, JBA 2035s headers and dey are perty, Diff breather mod, Red LED interior lights, Fancy head unit that plays ipod n movies, Also DIY install factory stuff like, factory cruise control, factory intermittent wipers, OME nitro struts with 886x springs and toy tec top plate, LR UCA's for better alignmnet and dey beefier too, Old Man Emu Dakar leaf springs in da rear with the gear, U bolt flipper, 5 factory 16" steels wit Pep Boys special Dakota Definity MT's in 285/75/16, some bad ass weather tech floor liners so I don't muck up my interior, an ATO shackle flipper for mo travel in da rear wit the gear, also super shiny Fox 2.0 shocks back there too, all sorts of steal armor for bouncing off of the rocks like demello sliders, AP front skid, trans skid, n transfer skid, demello gas tank skid, and a tough as nails ARB bumper with warn 8k winch, I'm sure there's more but it's alre

    Still curious on how you check an o2 sensor. Maybe mister Rhino will enlighten us. Then I always thought the rule of thumb was 100k miles or a check engine light would be the replacement intervals for them.
     
  18. Aug 10, 2011 at 3:04 PM
    #18
    SupraT

    SupraT Tacoma Lover

    Joined:
    Feb 26, 2010
    Member:
    #32148
    Messages:
    2,471
    Gender:
    Male
    First Name:
    Tony
    Columbia Falls
    Vehicle:
    98 TRD SR5 4x4
    3" Lift Three leaf add and Bilstin 5100"s in back and Donahoe coilovers in front, Tinted Windows, Blackened parking light, tinted brake lights, clear bumper lights, Blacked out turn signals, AVS vent visors, Electric Fan mod, K&N CAI

    I am super stoked too, since I am running 33x12.50s and a S/C....
     
  19. Aug 10, 2011 at 3:05 PM
    #19
    Honey badger

    Honey badger [OP] Honey badger hits whatever tree he wants to hit!!

    Joined:
    Oct 22, 2009
    Member:
    #24735
    Messages:
    2,197
    Gender:
    Male
    First Name:
    Bon
    Kinder, Louisiana
    Vehicle:
    02 DC BLACK 3.4
    Damn you are getting that with the S/C hmmm maybe I should put mine on and see if that helps. Also I am double cab not much but still more weight.
     
  20. Aug 10, 2011 at 3:09 PM
    #20
    Texoma

    Texoma Well-Known Member

    Joined:
    Feb 1, 2011
    Member:
    #50374
    Messages:
    3,872
    Gender:
    Male
    First Name:
    Chris(Topher)
    Lago Vista, TX
    Vehicle:
    10 Taco 4x4
    Poweraid TB spacer, a bunch a cool stickers, a bada ass MetalMiller Tx Longhorns grill emblem painted Hemi Orange, JBA 2035s headers and dey are perty, Diff breather mod, Red LED interior lights, Fancy head unit that plays ipod n movies, Also DIY install factory stuff like, factory cruise control, factory intermittent wipers, OME nitro struts with 886x springs and toy tec top plate, LR UCA's for better alignmnet and dey beefier too, Old Man Emu Dakar leaf springs in da rear with the gear, U bolt flipper, 5 factory 16" steels wit Pep Boys special Dakota Definity MT's in 285/75/16, some bad ass weather tech floor liners so I don't muck up my interior, an ATO shackle flipper for mo travel in da rear wit the gear, also super shiny Fox 2.0 shocks back there too, all sorts of steal armor for bouncing off of the rocks like demello sliders, AP front skid, trans skid, n transfer skid, demello gas tank skid, and a tough as nails ARB bumper with warn 8k winch, I'm sure there's more but it's alre

    Agreed. With how many factors there are in setting the tire pressure, there is really no set pressure you can really use. It is trial and error. I personally have found the chalk test to be the best. It accounts for the kind of tires and sizes and the weight of the vehicle. I had a truck with 285 nittos on it and the rears ran at 40 and the front left ran at 37 and front right ran at 38. Trial and error.
     
To Top