Holley 650 Electric Choke Help

Here's what I've learned about how an automatic choke is supposed to work.
You'll have to investigate the carb you've got has all the features.

Initial Choke position: This is where the choke plate sits when the engine off. It is the maximum restriction to the airflow.
Qualified Choke position: Plate position immediately upon starting.
* It's opened by manifold vacuum.
* The amount it opens is usually adjusted by increasing or decreasing the spring force on a vacuum diaphram.
* Usually the linkage is such that the qualified position is based on the initial position, not independent.
* It does not effect the throttle fast idle position.

Fast idle cam has two or three steps. In warmer weather the cam's linkage to the choke should rotate it off the upper step(s) pretty quick.
* Engine cold, cold weather the initial choke position brings the fast idle cam to so the throttle is resting on the upper step.
* Fast idle speed is usually adjusted on the second step.

Some carbs have internal vacuum source connection to the choke. They may not have a means of adjusting the qualified choke position if its internally connected. Some carbs don't have any vacuum source. I think the only solution for them is set the choke for the running position and use pump shot (working the throttle) to get it rich enough to fire off.

Unloader: Some mechanical means to hold the choke open when the throttle is close to wide open. A means to help clear a flooded intake if its held open.