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Thread: Sticky carb linkage?

  1. #1
    Administrator 74hurstolds's Avatar
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    Default Sticky carb linkage?

    Wow sounds like everyone is having issues with high idle.

    My issue with a high is a bit different and has the symptoms of a sticky butterflies. The only way to fix it is to jab on the throttle so it kicks back down. You'd think it's the linkage sticking but I believe it's not. When the car is off it moves freely and the throttle linkage is fully closed and returned to the idle position. I can't get it to stick partially open at all, only when the car is running. This tells me that the choke isn't interfering and the anti-diesel solenoid is not interfering either. Is it possible for manifold vacuum to pull the butterflies open on the carb, slightly preventing them from returning all the way? This the only thing I can think of.

  2. #2
    Administrator 88hurstolds's Avatar
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    On the 87 Salon?

    Primary needles could have a burr, throttle return spring too weak, mixture solinoid getting stuck open , vacuum leak (possibly at throttle bushing), choke bits getting in the way (wound up being my problem).
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  3. #3
    Administrator 74hurstolds's Avatar
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    It's definitely not the return spring. I put tied together some of the spirals to make it stronger. It returns all the way when the car is off so it can't be that.

    I'll rule out MCS and the primary needles because again its in the linkage, not an over abundance of fuel.

    It may be the choke linkage or the bushing on that side of the throttle butterflies that's sticking.

  4. #4
    Administrator 88hurstolds's Avatar
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    Choke bits... fiddle around there with a screw driver while it's running and you'll see.
    Happened because I mashed on the accelerator hard to get full WOT during hard driving...
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    88 CSC White/Claret - T-tops
    88 H/O Triple Black
    87 442 Black/Gray - T-tops
    85 442 White/Blue - T-tops
    85 442 White/Blue - T-tops
    85 442 White/Claret - T-tops
    85 442 White/Sage
    84 H/O Aero Commemorative #2199 - Sunroof
    83 H/O #2400 Sand Gray - Sunroof
    83 H/O #1607 Sand Gray - T-tops
    83 H/O #727 Maple
    "Keep them Rockets lit!"

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