One of the ways to get a good starting point is simply to loosen up the choke housing screws on the retainer. At that point is the choke plate wide open or not.
How To Select The Right Holley Carburetor For Your Car
Holley fast idle cam sticking. The fast idle cam should move freely with the engine warm or the linkage un hooked. It might fit together ok but stll not allow for full free travel of the lever cam or linkage rod. Theres probably a rod that connects the choke valve to the fast idle cam. Some carbs might allow you to install this rod backwards or upside down. I tightened it after the high idle issue. Polish the connecting parts and use thin washers to take up any extra slack but the cam must still move freely without binding.
Fast idle should be set at 2000 rpm. Slightly crack the throttle open unload the fast idle cam and turn the choke cap clockwise until you see the choke plate open. I actually just tightened the return spring because it was pretty loose. Loosen them up just enough to allow you to rotate the choke cap but not enough to allow it to freewheel. Maybe a spacer or washer missing somewhere. Holley fast idle hanging up so what your saying is the fast idle arm is still making contact with the fast idle screw when warmed up.
Adjust fast idle screw as needed. Try giving the carburetor a little gas at the throttle arm and make sure the choke plate is wide open. The sometimes get loose and because of excessive clearance will bind causing your problem.
Gallery of Holley Fast Idle Cam Sticking
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