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  1. #1

    Default Need IAC Help

    Sorry if there is already a post about this, but when I set the idle I get the IAC to 4%. In park & neutral, the IAC holds at 4% and holds the idle, but when I put the car in gear the IAC jumps to 30-40, and the motor starts stumbling. Wondering if any one has any ideas. Thanks.

  2. #2
    Join Date
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    Default

    Quote Originally Posted by Jholden56 View Post
    ...but when I put the car in gear the IAC jumps to 30-40, and the engine starts stumbling.
    Then you need to tune that "in gear" area of the Base Fuel and/or Timing Table.
    Read 8th paragraph: http://forums.holley.com/showthread....2523#post62523 (Holley EFI Tuning Tips & Information)
    May God's grace bless you in the Lord Jesus Christ.
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  3. #3

    Default

    OK, thank you for the help.

  4. #4

    Default

    Quote Originally Posted by Jholden56 View Post
    Sorry if there is already a post about this, but when I set the idle I get the IAC to 4%. In park & neutral, the IAC holds at 4% and holds the idle, but when I put the car in gear the IAC jumps to 30-40, and the motor starts stumbling. Wondering if any one has any ideas. Thanks.
    You can let the Sniper self-tune in gear or you can manually tune the Base Fuel Table. Just depends on which way you want to go. If the car runs in gear then just let it tune itself, since it should only a take a minute or two once the engine is warm. If the Sniper is in Closed Loop and is Learning, then put it in gear and watch the compensations. They might start out high, but they should drop quickly as it Learns. If it won't stay running then see which way the tune needs to go (richer or leaner) and manually adjust the table in that area, then start the engine again and see what it does.

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