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ported throttle body new idle

This is a discussion on ported throttle body new idle within the External Engine forums, part of the LSx Technical Help Section category; alright so i bought a ported stock tb from a guy and my idle went up from 500rpm in gear ...

  1. #1
    Junior Member
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    dark blue
    1999 camaro ss

    ported throttle body new idle

    alright so i bought a ported stock tb from a guy and my idle went up from 500rpm in gear to 700rpm in gear with the new tb is this becasue of the port or is there a way to adjust the idle on ls1s my car is a 99 this new tb came off a 98 trans am.

  2. #2
    Junior Member jc99ls1ss's Avatar
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    Bright Red
    1999 Camaro SS

    There is an adjustment screw on the side where the spring is. May bring it down and may not. Look around the plate and see if there are any gaps where it was ported. If so that could be the reason why.

  3. #3
    Slow'er'Ass Mr. Luos's Avatar
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    Red Tint Jewelcoat
    2008 Trailblazer SS

    Miles with it on the car?

    Computer will take 50-80 miles (depending on conditions) to relearn the new airflow.

  4. #4
    Member Sweet Chops's Avatar
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    Hugger Orange
    1999 Camaro Z28

    Quote Originally Posted by Mr. Luos View Post
    Miles with it on the car?

    Computer will take 50-80 miles (depending on conditions) to relearn the new airflow.
    It shouldn't matter at Idle.

    Also look at the size of the hole on the blade. I could be bigger than the hole on your stock TB. If it is Just swap the two blades.

    Ryan

  5. #5
    Slow'er'Ass Mr. Luos's Avatar
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    Red Tint Jewelcoat
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    Quote Originally Posted by Ryan99 View Post
    It shouldn't matter at Idle.
    Ryan
    It did on mine.

    Relearns a new idle as well as new fuel trims.

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