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Cleaning Throttle Body - 2001 4runner

Discussion in '3rd Gen Builds (1996-2002)' started by ramonortiz55, Nov 3, 2016.

  1. Nov 3, 2016 at 12:10 PM
    #1
    ramonortiz55

    ramonortiz55 [OP] New Member

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    Last weekend I decided to clean the throttle body on my 4runner.

    Decided to document the procedure In hopes it would benefit someone who likes do things on their own:

    For this task, I picked up some throttle body cleaner, a rag, and my wife's toothbrush:

    [​IMG]

    One of the most important steps in this procedure is to stare down the throttle for a good 2 or 3 minutes. This helps break down the carbon inside. The harder you stare, the more it breaks down and easier it is to clean. Sorta like WD-40 loosens up rusted nuts and bolts.

    [​IMG]

    First step is removing the airbox assembly, loosen airbox bolts and straps:

    [​IMG]

    [​IMG]

    unplug mass airflow sensor and any other connectors in the vicinity:

    [​IMG]

    There will be a smaller airbox towards the firewall with some airlines connecting into it, remove the airhoses and the small airbox:

    [​IMG]

    [​IMG]

    Don't forget the airhoses that run towards the front of the engine towards the piping of the airbox:

    [​IMG]

    [​IMG]

    Loosening these thinner clamps will help removing the piping to the airbox:

    [​IMG]


    [​IMG]

    Remove another plug, this one is right besides the accelerator cable:

    [​IMG]

    Three cooling lines will be feeding into the throttle body, these can be removed also:

    [​IMG]

    [​IMG]

    [​IMG]

    Another plug:

    [​IMG]

    Remove the accelerator cable off the throttle, this can be done by clocking the body of the spring and sliding it out carefully:

    [​IMG]

    Another picture of everything removed:

    [​IMG]

    Remove the two top nuts that are holding the throttle in position:

    [​IMG]

    Now remove the bottom bolts that are holding the throttle in position:

    [​IMG]

    Pull off the throttle gently:

    [​IMG]

    Take it to the operating table:

    [​IMG]

    Generously spray inside the throttle body with cleaner and brush the carbon off with your wife's toothbrush and rag:

    [​IMG]

    Carefully rotate the "door" to make sure all the carbon buildup has been cleaned out.

    If you aren't bleeding, you aren't done:

    [​IMG]

    Once you are satisfied with the removal of carbon, installation is reverse of removal.

    [​IMG]
     
    GPSevinSixx and jester243 like this.
  2. Sep 13, 2017 at 5:13 PM
    #2
    kf4aqo

    kf4aqo New Member

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    near Athens, GA
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    2000 4Runner, 1986 FJ 60
    Cool toothbrush.
     
  3. Sep 13, 2017 at 7:36 PM
    #3
    ramonortiz55

    ramonortiz55 [OP] New Member

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    it was my wife's.
     
  4. Sep 14, 2017 at 3:36 PM
    #4
    kf4aqo

    kf4aqo New Member

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    2000 4Runner, 1986 FJ 60
    Good write up also. Did you notice a different in performance, gas mileage, anything. (Other than I looks really clean.)
     
  5. Sep 15, 2017 at 5:30 AM
    #5
    ramonortiz55

    ramonortiz55 [OP] New Member

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    i felt a better response to the throttle
     
  6. Sep 15, 2017 at 8:19 AM
    #6
    RonT4R

    RonT4R New Member

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    Virginia Beach
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    LOL, love the write up Ramon!!!
     
  7. Sep 21, 2017 at 9:20 AM
    #7
    GPSevinSixx

    GPSevinSixx New Member

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    Will be doing this soon. IACV might be acting up on mine. Only slightly rough at cold startup and a little low RPM sometimes, but fine and perfect operation fully warmed up to operating temps.
    Did you get a new TB gasket or was the old one in decent shape to reuse?
     
  8. Sep 21, 2017 at 10:52 AM
    #8
    ramonortiz55

    ramonortiz55 [OP] New Member

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    i reused the same one.. still good
     
    GPSevinSixx likes this.
  9. Jun 25, 2018 at 4:34 PM
    #9
    5skierz

    5skierz New Member

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    I know this is an old thread, but can someone tell me where the IAC valve is on this TB? Thx
     
  10. Apr 24, 2020 at 11:10 PM
    #10
    cashflow50

    cashflow50 New Member

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    I want to know where the IAC is as well. Took off my TB and nothing that resembles what I see online. I have the same exact TB as what is on the photos on this thread. I did remove the plate on the TB that 4 screws holds down thinking that was the IAC.
     
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