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High idle surge

Discussion in '1st Gen. Tacomas (1995-2004)' started by Hunterj0hn, Nov 3, 2020.

  1. Nov 3, 2020 at 5:04 PM
    #1
    Hunterj0hn

    #1
    Hunterj0hn [OP] Member

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    2001 tacoma 2.7 4x4. It started yesterday idling high and surging between 1500-2000 rpms. Any help is appreciated.
     
    Hunterj0hn, Nov 3, 2020
    #1
  2. Nov 4, 2020 at 9:44 AM
    #2
    aroma

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    aroma Well-Known Member

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    aroma, Nov 4, 2020
    #2
  3. Nov 4, 2020 at 9:51 AM
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    tirediron

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    tirediron Well-Known Member

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    Before pulling the trigger on the parts cannon, I would do a little more analysis. Check out your fuel trims, O2 sensors, check for vacuum leaks, test your IAC, and throttle body.
     
    tirediron, Nov 4, 2020
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    Hobbs likes this.
  4. Nov 13, 2020 at 5:05 PM
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    Hunterj0hn

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    Hunterj0hn [OP] Member

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    It turned out that the throttle body valve was hanging up. Cleaned it and everything works good.
     
    Hunterj0hn, Nov 13, 2020
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  5. Nov 13, 2020 at 5:11 PM
    #5
    TnShooter

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    TnShooter The TacomaWorld Stray

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    Thanks for the update
    Good to see you got it fixed :thumbsup:
     
    TnShooter, Nov 13, 2020
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    Hobbs likes this.
  6. Nov 13, 2020 at 5:16 PM
    #6
    Rastopher

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    Rastopher Well-Known Member

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    You mean the idle air control valve on the bottom of the throttle body? Seems like its the answer every time.
     
    Rastopher, Nov 13, 2020
    #6
  7. Nov 13, 2020 at 5:59 PM
    #7
    Hunterj0hn

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    Hunterj0hn [OP] Member

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    No the valve in the throttle body.
     
    Hunterj0hn, Nov 13, 2020
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  8. Nov 13, 2020 at 6:10 PM
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    aroma

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    aroma Well-Known Member

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    Ok. Stupid me. What is a throttle body valve?
     
    aroma, Nov 13, 2020
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  9. Nov 13, 2020 at 6:19 PM
    #9
    Hunterj0hn

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    Hunterj0hn [OP] Member

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    Its a butterfly valve in the throttle body. It opens and closes as you accelerate or decelerate.
     
    Hunterj0hn, Nov 13, 2020
    #9
  10. Nov 13, 2020 at 9:40 PM
    #10
    Logans2001

    #10
    Logans2001 What’s crackin’

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    Where/what is the IAC valve?
     
    Logans2001, Nov 13, 2020
    #10

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