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Thread: 400 4bbl Sportwagon

  1. #1

    400 4bbl Sportwagon

    Gosh it's fun getting the bugs out of a vehicle that hasn't run in a year! My '69 Buick Sportwagon is up and running again....such as it is. The car runs and drives great BUT....today it wouldn't come off a high idle when slowing down for stop lights. If I was driving at 40 Mph or 35 Mph, whatever speed, I could take my foot off of the gas and the vehicle would stay that speed or slowly increase. What the hey? The car has the 400 4 bbl automatic trans.

  2. #2
    Join Date
    Dec 2013
    Location
    West Virgi
    Posts
    54
    Rep Power
    0

    My issue was sumular in that after warm up,

    My car would start off fine and around 1500 rpms, the car would not slow down when I took my foot off of the accelerator pedal. The problem began when I put on a new quarajet carb and gasket. Seems the flap on one of the 4 holes in the bottom of the carb was hanging up on the gasket and not allowing the throttle to fully return to idle position. I should have checked for clearance before I mounted the carb but live and learn.

    Just my two cents.

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