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Running rich with a CAI

Discussion in 'Technical Chat' started by Joe B, Dec 1, 2008.

  1. Dec 1, 2008 at 5:37 AM
    #1
    Joe B

    Joe B [OP] Well-Known Member

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    Many say the engine runs rich with a CAI.
    If so why doesn't the engine come on?
    Wouldn't the exhaust tip be black too?:confused:
     
  2. Dec 1, 2008 at 9:36 AM
    #2
    wiscdave

    wiscdave Lets Do It!

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    Past ride - 3" OME 885s&Shocks/ TSB 1.5AAL/ AX184 Rims 285 Firestone destination ATs/ 2 Shallow mount P310s in Supercrew Box - Punch 601s, Beefed up Hunter Brush guard, Tint, Fog light mod, AFE Drop in, AC and Fog light mods, scangauge
    AFE/TRD are fine.
     
  3. Dec 1, 2008 at 1:36 PM
    #3
    Brunes

    Brunes abides.

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    Do you have a source as to who said this?? I'd like to see what they say about it.

    I'm guessing this is a wording problem. The ECU can enrichen the mixture based on the air flowing into the engine ...More air thru the CAI means more fuel is needed for the AFR to remain correct...so it may put more gas into a given volume of air...but it won't be an OVER-rich mixture...just richer then stock.

    And I'm sure Chris will be along any minute now to school us (mainly me) on what is REALLY happening....=)
     
  4. Dec 1, 2008 at 1:39 PM
    #4
    Dark Knight

    Dark Knight Well-Known Member

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    my exhaust tip was black with the stock air system. I did take the battery cable off while installing my TRD intake and TRD exhaust so the computer would reset, everything runs great.
     
  5. Dec 1, 2008 at 1:57 PM
    #5
    roxspin72

    roxspin72 Enjoying my addiction

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    Oh Yeah!!!
    Our Taco's run rich from the get go. When you add a CAI, the ECU will try to adjust by adding more fuel. This is what I got from studying up and reading Gadgets U-Tune Doc, while tuning my MAF calibrator.

    My True Flow was causing my truck to run Rich big time:

    When I hooked up my LM-2, my A/F ratio at WOT or Open loop was 11.2-11.6ish. There was even points in open loop it was in the 10's, and never threw a code. But now that it's tuned, it stays around 12.5 @ WOT which is optimal for performance. Believe me, it made a difference. Oh and with the MAF Cali, you can adjust fuel trims at closed loop also. This will help daily driving.

    So not sure on all CAI, by I do agree that this statement is true.
     
  6. Dec 1, 2008 at 2:10 PM
    #6
    Brunes

    Brunes abides.

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    This is good to know...Now I've got a reason to tell me wife that I NEED that MAF Cal....=)

    And if it's rich to start...then yes...it'll be rich after a CAI if it is not tuned between
     
  7. Dec 2, 2008 at 5:33 AM
    #7
    Joe B

    Joe B [OP] Well-Known Member

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    Yeah,I've read it's rich at WOT.
    The trouble with installing a URD MAF is the Toyota warranty issue.
    I'm going to go with a TRD Supercharger.
    I will be selling my Volant pieces for a nice price if I do.
     
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