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Throttle body tuning

Discussion in '1st Gen. Tacomas (1995-2004)' started by Hunter9720, Mar 8, 2017.

  1. Mar 8, 2017 at 12:27 PM
    #1
    Hunter9720

    Hunter9720 [OP] Member

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    OK so when I did the valve covers on my 99 Tacoma with the 3.4 V6 the throttle body positioning bolts got spun to the wrong settings on all the cables so now the trucks way out of sync with its idols. I just need to know what cables adjusts what so I can retune it I'm 90% certine the first cable is the TPS second is gas and third is park idol but I have no idea also need to know the standered park and drive idol rpm
     
  2. Mar 9, 2017 at 12:27 AM
    #2
    DrZ

    DrZ Well-Known Member

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    I believe the idle speed is controlled by the computer and not adjusted by the cables. Somewhere in the factory service manual it should tell how to adjust these cables correctly, but I'm not familiar enough with the 3.4L or 99 model, so maybe someone else can chime in.
     
  3. Mar 9, 2017 at 8:13 AM
    #3
    drr

    drr Primary Prognosticator

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    ^as he said, idle speed has nothing to do with throttle body linkage, it is computer or vacuum controlled, depending on the year.
    The three cables are the throttle linkage (from gas pedal), cruise control (box on passenger side fender), and the transmission kickdown cable. They should all be adjusted so that there is no more than 1/4" play in the cable before the throttle starts to open. I can post up the FSM later if you still have questions, but that's the basic premise.
     
    cruiserguy likes this.

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