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  1. #1
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    Default Engine Idles Only if Choke is Closed.

    Hello All,

    I have a 1975 350 manual shift. Bought a 1604 Edelbrok carb and installed with pressure gauge and pressure valve. Fuel pressure set to 5.5 to 6 pounds. The problem is the engine stalls on idle. If you close the choke down the engine idles fine, but if the choke is open the engine stalls almost immediately. Timing set to 10 BTC. Spark plugs, wire, distributer cap, rotor, coil, fuel pump, filter all changed.

    Does anyone have this problem or know what would cause this?

  2. #2
    Member LLC5's Avatar
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    Sounds like you have a vacuum leak somewhere. A propane bottle with a hose on it is the safest and easiest way to find it.
    Master Technician

    25+ year ASE Master Certified Tech

    22+ year Honda Master Tech

  3. #3
    Administrator Tom Bryant's Avatar
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    1959 black 270hp (9/2/69) 1981 Beige L81(10/20/80)
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    Sounds that way to me too.

    Tom
    NCRS 1360.............SACC 2082.............C1 Registry..............L81 Registry
    1959 Chevrolet Corvette 1981 Chevrolet Corvette , 350 L81 automatic Frost Beige

  4. #4
    Member douglasamariani's Avatar
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    Yup
    you have a vacuum leak.....

  5. #5
    Technical Writer for Internet & Print Media
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    Default

    Vacuum leak is the most obvious.

    Also could be a carb that is way out of adjustment for idle mixture or is defective.

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