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
    Quick Links: Painting CMC Transmission Pan Replacement Those with a ScanGauge. What's your typical transmission temperature? Gear Oil- 80w-90 vs 75w90 Idler pulleys and belt tensioner $$$ Defrost smells like stinky socks?

Terrible mileage after installing cold air intake??

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Drew12, Nov 8, 2017.

Page 1 of 2
  1. Nov 8, 2017 at 7:40 PM
    #1
    Drew12

    #1
    Drew12 [OP] Well-Known Member

    Joined:
    May 31, 2016
    Member:
    #188361
    Messages:
    314
    Gender:
    Male
    First Name:
    Andrew
    Sisters, Oregon
    Vehicle:
    2005 4x4 TRD OR Access Cab
    Bilstein 5100's/Toytec 620 coils, rear AAL, Camburg UCA's, Pro Comp 7069, AFE stage 2 CAI, Blacked Depo Headlights
    Hey guys,

    Installed an afe stage 2 cold air intake a couple weeks ago. Since then, Ive been getting significantly WORSE gas mileage. Went from about 17-18 down to 13-14... Only extra weight I have is a camper shell, but thats been on since even before I installed the new intake. It has gotten quite a bit colder here than usual (about 20-35 degrees) but I dont think thats the whole cause. My MAF sensor threw a code even before I installed the intake as well but everything has seemed to be running great so far... More power ad throttle response but getting 138 miles out of a half tank is a little rediculous... Anyone have any ideas what could be going on?
     
    Drew12, Nov 8, 2017
    #1
  2. Nov 8, 2017 at 7:47 PM
    #2
    Bebop

    #2
    Bebop Old fashion cowboy

    Joined:
    Feb 11, 2016
    Member:
    #177835
    Messages:
    4,407
    Gender:
    Male
    First Name:
    Nick
    Castle rock Colorado
    Vehicle:
    2012 Toyota Tacoma baja
    6inch lift sitting on bilstein coilovers. Lexus is300 studs in front to keep stock wheels, general grabber red letters, nfab front bumper.
    Put your old one back on and see what happens.
     
    Bebop, Nov 8, 2017
    #2
    crhsharks12, jetfishn, Alexely999 and 4 others like this.
  3. Nov 8, 2017 at 7:51 PM
    #3
    shr133

    #3
    shr133 Well-Known Member

    Joined:
    Jul 8, 2013
    Member:
    #107900
    Messages:
    2,215
    Gender:
    Male
    First Name:
    Steve
    Muskego, WI
    Vehicle:
    2010 V6 Sport
    K & N filter, 275 70 17 Cooper AT3, OME Nitrocharger shocks, 884 Springs, Dakar leafs.
    Clean or replace your MAF....... Try to reset the ECU..... MPG should be the same.....
    But if anything put the stock one back on to see if it persist....
     
    shr133, Nov 8, 2017
    #3
    inwood customs likes this.
  4. Nov 8, 2017 at 7:53 PM
    #4
    Justn868

    #4
    Justn868 Well-Known Member

    Joined:
    Apr 17, 2014
    Member:
    #127920
    Messages:
    544
    Gender:
    Male
    First Name:
    Justin
    Kansas City
    Vehicle:
    14 4x4 TRD OR
    Have you been romping the throttle a little more with the new intake?
     
    Justn868, Nov 8, 2017
    #4
    PD805, TnShooter, 20somethingwidataco and 3 others like this.
  5. Nov 8, 2017 at 8:01 PM
    #5
    b_r_o

    #5
    b_r_o Gnar doggy

    Joined:
    Nov 17, 2016
    Member:
    #202672
    Messages:
    13,926
    First Name:
    Alex
    WA
    Vehicle:
    2015 DCLB
    Cai can affect the way the air flows over the hot wire. Or your maf is bad, if it coded recently it's probably bad
     
    b_r_o, Nov 8, 2017
    #5
  6. Nov 8, 2017 at 8:48 PM
    #6
    Del Scorcho

    #6
    Del Scorcho O-------l

    Joined:
    Apr 30, 2012
    Member:
    #77919
    Messages:
    224
    Gender:
    Male
    Eagle, ID
    Vehicle:
    DCLB 6 banger, 4X and Super Charged
    Magnuson Supercharger, 2.85 Stealth Pulley, TRD Baja Suspension, Walbro Fuel pump, Icon add a leaf, Method 701s
    More air from the CAI plus the colder, denser air from the ambient temp will do it. That's every reason for your ECU to need to add fuel.
     
    Del Scorcho, Nov 8, 2017
    #6
  7. Nov 8, 2017 at 9:01 PM
    #7
    Drew12

    #7
    Drew12 [OP] Well-Known Member

    Joined:
    May 31, 2016
    Member:
    #188361
    Messages:
    314
    Gender:
    Male
    First Name:
    Andrew
    Sisters, Oregon
    Vehicle:
    2005 4x4 TRD OR Access Cab
    Bilstein 5100's/Toytec 620 coils, rear AAL, Camburg UCA's, Pro Comp 7069, AFE stage 2 CAI, Blacked Depo Headlights
    Not anymore than I did with the stock intake. I usually dont romp on it unless I have to .
     
    Drew12, Nov 8, 2017
    #7
  8. Nov 8, 2017 at 9:02 PM
    #8
    Drew12

    #8
    Drew12 [OP] Well-Known Member

    Joined:
    May 31, 2016
    Member:
    #188361
    Messages:
    314
    Gender:
    Male
    First Name:
    Andrew
    Sisters, Oregon
    Vehicle:
    2005 4x4 TRD OR Access Cab
    Bilstein 5100's/Toytec 620 coils, rear AAL, Camburg UCA's, Pro Comp 7069, AFE stage 2 CAI, Blacked Depo Headlights
    Hopefully its not.. Guna be at toyota on monday and they are doing a big ol checkup of some other stuff and will be reading codes as well. We will see what they have to say.
     
    Drew12, Nov 8, 2017
    #8
  9. Nov 8, 2017 at 9:03 PM
    #9
    Drew12

    #9
    Drew12 [OP] Well-Known Member

    Joined:
    May 31, 2016
    Member:
    #188361
    Messages:
    314
    Gender:
    Male
    First Name:
    Andrew
    Sisters, Oregon
    Vehicle:
    2005 4x4 TRD OR Access Cab
    Bilstein 5100's/Toytec 620 coils, rear AAL, Camburg UCA's, Pro Comp 7069, AFE stage 2 CAI, Blacked Depo Headlights
    Hopefully this is whats going on. Just sucks because I thought I would atleast have the same mpgs as before. Even last year in even colder weather I was getting better mileage with stock. I guess could chalk it up to more idle time for warm up too?
     
    Drew12, Nov 8, 2017
    #9
  10. Nov 9, 2017 at 2:25 AM
    #10
    Jimmyh

    #10
    Jimmyh Well-Known Member

    Joined:
    May 16, 2012
    Member:
    #78991
    Messages:
    14,197
    Gender:
    Male
    SC
    Vehicle:
    2012 Prerunner SR5
    Toyota is going to say the CAI is causing the problem.

    Install the original intake and then take it to Toyota.
     
    Jimmyh, Nov 9, 2017
    #10
    Topdogdad1, Drew12[OP], Alexely999 and 3 others like this.
  11. Nov 9, 2017 at 4:21 AM
    #11
    Chris(NJ)

    #11
    Chris(NJ) Well-Known Member

    Joined:
    Jan 21, 2010
    Member:
    #29777
    Messages:
    5,049
    Gender:
    Male
    First Name:
    Chris
    Usually in Central Jersey
    Vehicle:
    08 Indigo 4x4 DC OR
    Mods are currently being changed .....
    Did anyone mention winter blend fuel mix? My MPGs dropped by almost 2 on the last fillup. I'm assuming they switched to winter blends around now.
     
    Chris(NJ), Nov 9, 2017
    #11
    blu92in99 likes this.
  12. Nov 9, 2017 at 7:02 AM
    #12
    lynlan1819

    #12
    lynlan1819 Well-Known Member

    Joined:
    Mar 14, 2016
    Member:
    #181268
    Messages:
    6,539
    Gender:
    Male
    First Name:
    Tacoma
    Lifted
    What Jimmy said,Toyota will say put the stock parts back on! Again hardly any aftermarket items for the motor ever work better than stock parts do.
     
    lynlan1819, Nov 9, 2017
    #12
    Lester Lugnut and Alexely999 like this.
  13. Nov 9, 2017 at 7:06 AM
    #13
    lynlan1819

    #13
    lynlan1819 Well-Known Member

    Joined:
    Mar 14, 2016
    Member:
    #181268
    Messages:
    6,539
    Gender:
    Male
    First Name:
    Tacoma
    Lifted
    When I bought my 2015,I changed too a locking gas cap,within a day my truck was throwing a code,took it too Toyota and they said put the stock cap back on,I did and no more codes,crazy how a part made for a specific truck by a aftermarket manufacture will not work on your truck.
     
    lynlan1819, Nov 9, 2017
    #13
  14. Nov 9, 2017 at 7:35 AM
    #14
    Pigpen

    #14
    Pigpen My truck is never clean

    Joined:
    Mar 6, 2012
    Member:
    #74319
    Messages:
    9,158
    Gender:
    Male
    Northwest Montana
    Vehicle:
    2012 AC Manual 4.0 4x4 Base Model
    Access cab with child seat in the back, yellow wire mod, diff breather relocated to tail light, engine block heater, Leer topper with Yakima tracks and rack, Yakima rack on cab, Ride Rite air bags with Daystar cradles, CBI hidden front hitch, wired for winch front and rear Warn quick connect, Warn x8000i on external carrier, sway bar delete, trailer plug relocated to under bumper, Pelfreybilt IFS and Mid skids, BAMF Tcase skid, ECGS front diff bushing, ARB CKMA12 compressor, 255/85/16 Backcountry MT 3 load E tires on stock steel rims, Toyo M55 tires (same size) on another set of stock steelies, Up2NoGood heated mirror kit, Husky X-act Contour front floor liners, Northstar AGM 24F battery under the hood, Northstar 27F in the cab, Redarc 25 amp DC to DC charger, Pelfreybilt bolt on sliders with kickout and top plates, TRD Pro headlights, Depo smoked tail lights, Energy suspension body mount bushing kit, OME Dakar leaf packs with AAL, OME rear shocks, OME 90021 front shocks with 885 coils, SPC LR UCAs, Up2NoGood 2wd low range mod, 4 Wheel Campers Grandby slide in camper, 4xinnovations high clearance rear bumper, Uniclutch 800 lb/ft clutch
    You know the truck came stock with a CAI, right?

    To take advantage of more air flow in, you need to boost it, increase fuel flow, and increase air flow out.
     
    Pigpen, Nov 9, 2017
    #14
    Topdogdad1 and Alexely999 like this.
  15. Nov 9, 2017 at 8:46 AM
    #15
    nd4spdbh

    #15
    nd4spdbh Well-Known Member

    Joined:
    Oct 7, 2013
    Member:
    #114055
    Messages:
    14,506
    Gender:
    Male
    SoCal
    Vehicle:
    13 DCSB TRD OR v6 Auto
    this right here. Stick the stock CAI back on.
     
    nd4spdbh, Nov 9, 2017
    #15
    Topdogdad1, Pigpen[QUOTED] and Alexely999 like this.
  16. Nov 9, 2017 at 9:46 AM
    #16
    SUMOTNK

    #16
    SUMOTNK Pavement Pounder / Mall Crawler

    Joined:
    Sep 8, 2014
    Member:
    #137895
    Messages:
    2,973
    Gender:
    Male
    First Name:
    Eddie
    NorCal/South Bay Area
    Vehicle:
    Looks like a Gen2.5 TRD Sport, but really an '08 TRD OffRoad
    TRD Supercharged / OTT Tuned
    1. Disconnect negative terminal from your battery.

    2. Remove the MAF from the new CAI and spray it with some MAF cleaner.

    3. Reinstall MAF and double check all hose clamps are tight on your CAI.

    4. Reconnect negative terminal to your battery.

    ---------------------------------------------------------

    If doing the above doesn't change a thing with your fuel economy, then repeat the above but reinstall your stock intake system instead of the AFE. And then reassess your fuel economy.

    Good luck and report back any discoveries!
     
    SUMOTNK, Nov 9, 2017
    #16
    Drew12[OP] and TireFire like this.
  17. Nov 9, 2017 at 12:05 PM
    #17
    Monkeybutt2000

    #17
    Monkeybutt2000 Well-Known Member

    Joined:
    Mar 5, 2015
    Member:
    #150217
    Messages:
    794
    Gender:
    Male
    Stop it just stop. But it says it adds X amount of hp and X amount of mpg!
     
    Monkeybutt2000, Nov 9, 2017
    #17
    Pigpen[QUOTED] likes this.
  18. Nov 9, 2017 at 12:12 PM
    #18
    b_r_o

    #18
    b_r_o Gnar doggy

    Joined:
    Nov 17, 2016
    Member:
    #202672
    Messages:
    13,926
    First Name:
    Alex
    WA
    Vehicle:
    2015 DCLB
    If the maf coded, it needs a maf
     
    b_r_o, Nov 9, 2017
    #18
    Pigpen likes this.
  19. Nov 10, 2017 at 2:28 PM
    #19
    Drew12

    #19
    Drew12 [OP] Well-Known Member

    Joined:
    May 31, 2016
    Member:
    #188361
    Messages:
    314
    Gender:
    Male
    First Name:
    Andrew
    Sisters, Oregon
    Vehicle:
    2005 4x4 TRD OR Access Cab
    Bilstein 5100's/Toytec 620 coils, rear AAL, Camburg UCA's, Pro Comp 7069, AFE stage 2 CAI, Blacked Depo Headlights
    I know a lot of people think that its pointless to put a CAI on these trucks, but its something I wanted to do and got a great deal on a used one. Just trying to trouble shoot, that's all. If anyone has a tutorial for checking the MAF sensor with a multimeter that would be awesome. I don't have much experience with wiring, etc so I would like to learn. I know how to use a multimeter so any assistance with which wires to probe and the correct readings would be awesome. Will also try running the stock intake for a tank or so of gas to see if the CAI is indeed the problem... Thanks guys
     
    Drew12, Nov 10, 2017
    #19
  20. Nov 10, 2017 at 3:13 PM
    #20
    b_r_o

    #20
    b_r_o Gnar doggy

    Joined:
    Nov 17, 2016
    Member:
    #202672
    Messages:
    13,926
    First Name:
    Alex
    WA
    Vehicle:
    2015 DCLB
    The best way to test a MAF sensor is to purchase a small cheap code reader that will let you look at some data while driving. You can look at grams per second and also the calculated load will be helpful. However, if the problem is intermittent you will need to catch it in the act. As I stated before, just the fact that the maf coded is a huge clue that it is on the fritz
     
    b_r_o, Nov 10, 2017
    #20
Page 1 of 2

Products Discussed in

Denso 197-6030 Mass Air Flow Sensor
$85.95
To Top