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losing MPG with a CAI?

Discussion in 'Performance and Tuning' started by ez_money08, Jan 7, 2009.

  1. Jan 7, 2009 at 6:02 PM
    #1
    ez_money08

    ez_money08 [OP] EZ's Black Taco

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    3 1/2" Icon coilovers, wheelers 2" AAL's, Total Chaos UCA's, diff drop, carrier bearing drop, TRD Cai, Magnaflow exhaust, halo projector headlights, L.E.D tail lights, Blue gauge light mod, Satoshi grille, Hella 700's with H.I.D conversion behind grille, herculiner on rockers and rear bumper, lighted buggy whip mount in bed
    I recently installed a TRD CAI. The increase in Horsepower is good, but my MPG went to hell. any suggestions on what might be going on?
     
  2. Jan 7, 2009 at 6:03 PM
    #2
    roggs01

    roggs01 Roggs01

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    Are you driving with a heavy foot?
     
  3. Jan 7, 2009 at 6:05 PM
    #3
    carolinyens

    carolinyens Creedmoor Connections

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    You gotta be punching it all over the place. I know I had this problem when I first had this installed. But once you get used to it, it will help a little with mpg but dont expect a crazy increase in it.

    Add this to your modifications
     
  4. Jan 7, 2009 at 6:19 PM
    #4
    Gr8WhiteTaco

    Gr8WhiteTaco bishes love my haircut

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    you must be standing on the throttle pedal alot bc my truck is like that, but driving easy u should get relatively good mpg, but yours is a 4.0 so it might be different from my 3.4
     
  5. Jan 7, 2009 at 11:08 PM
    #5
    ez_money08

    ez_money08 [OP] EZ's Black Taco

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    not really driving with much of a heavy foot. i will punch it now and then though cuz it sounds good. planning on a magnaflow exhaust and chip to recalibrate the speedo on trans shift points next
     
  6. Jan 7, 2009 at 11:13 PM
    #6
    dunkhi

    dunkhi CSULB socal

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    did it give u a good sound?

    and did u really feel the hp gain?
     
  7. Jan 8, 2009 at 12:20 AM
    #7
    Evil Monkey

    Evil Monkey There's an evil monkey in my truck

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    http://fuelsaving.info/power_economy.htm

    Letting more air in means you can use more fuel, which is what's increasing the power.
     
  8. Jan 8, 2009 at 12:36 AM
    #8
    nurseboy

    nurseboy Well-Known Member

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    is right. the more air you suck into the motor, the more fuel is needed. more HP but burn more gas.
     
  9. Jun 22, 2009 at 6:30 PM
    #9
    sjdm4211

    sjdm4211 Member

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    I totally disagree, Less restriction means the engine doesn't work as hard sucking air in. You won't have to burn as much gas to get the same amount of HP out of the engine as before installing the CAI. Same thing goes for exhaust.

    The OP's problem is obviously a lead foot.

    My problem with a CAI is paying $250 plus to get 7 more HP out of my 2006 2.7. If I am only getting 7 HP how much improvement to my MPG could I possibly get.
     
  10. Jun 25, 2009 at 10:34 AM
    #10
    sriley727

    sriley727 Well-Known Member

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    1. You may have gotten dirt on the MAF element which could throw off your mpg. Try cleaning it with electrical cleaner.

    2. Inferior CAI's will disrupt the flow of air in a manner that throws the MAF a curve ball and could cause bad mpg.

    In theory, you should be getting better mileage with the maf because of the increase in efficiency.
     
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