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  1. #1

    Default Holley Throttle body problems

    I recently purchased the holley throttle body 670 cfm 502-9 for my tbi 350. I installed the unit and its idle is somewhere around 1500. I am wondering how you can adjust the idle. The throttle body also sticks after you open it up all the way. Any suggestions about how to keep remedy both of these problems?

  2. #2


    What kind of truck do you have? I would fix the sticking throttle first. Something is binding. Start loosening bolts until it quits sticking. Post up your truck info and we'll tell you how to adjust the idle.

    2004 SILVERADO 2500HD LS
    Pro Comp Leveling Kit
    285-75-16 Cooper ST All Terrains
    Pro Comp Programmer
    Bilstein Shocks
    Linux Bed Liner
    Tinted Windows

    Other rides:

    1967 Landcruiser <350 Chevy>
    1970 Camaro
    1990 Geo Metro Convertible
    2007 FJ Cruiser

  3. #3


    I fixed the sticking problem. I had to adjust the idle control spring which was catching. At the time I did not realize that the idle control was on the left side of the throttle body, but after playing with it I got the idle to where I want. The only problem that I am having now is that when I step on the throttle it feels like the engine bogs down like its not getting enough fuel.

    As for my truck I have a 93 k1500 with a 5.7 350 5spd standard

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