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TBI idle adjustment screw!

Discussion in 'The Garage' started by FlatBlackBurb, Apr 22, 2007.

  1. FlatBlackBurb

    FlatBlackBurb 1/2 ton status

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    okay so im trying to adjust the idle screw on my '87 TBI unit. what kind of screw is it? i cant see really well down there and im just wondering if anyone can help me?

    thanks
     
  2. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    The screw you're talking about is probably a torx screw but adjusting it brings on a whole new set of problems.
     
  3. Thunder

    Thunder 3/4 ton status

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    The adjustment screw is under a metal cap on the front of the TB. You have to drill out the cap to get to it.
    It is really never ment to be adjusted from the factory setting. The ECM takes care of the idle. If you are having idle problems messing with that screw wont help much and may cause other problems.
    If you have idle problems there is something else wrong.
     
  4. K5er4Life

    K5er4Life 1/2 ton status

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    If your trying to adjust idle you can do so, you need to adjust minimum air. Its a really simple procedure, search here or over at thirdgen to do it. I would explain but Im typing with one hand right now as my wrist is broken.
     
  5. dyeager535

    dyeager535 1 ton status Premium Member

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    If the cap is still there, the screw hasn't been messed with, and isn't your problem.
     
  6. resurrected_jimmy

    resurrected_jimmy 1/2 ton status

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