Electric Choke?

[cdawglean]

I have a Holley Carb that has an electric choke. However only the ground wire is hooked up and I don't know what wire belongs on the positive side of the choke. What does an electric choke do and how do I get it hooked up correctly? The engine runs fine once I start it however sometimes I do need to keep giving gas for a minute or so after starting.

 

[doktor_x]

It needs a wire that's hot with the key in the run position. Wires that are energized with the key in the accessory position are bad since there's nothing pulling air across the bi-metal spring to keep it from becoming a puddle. Avoid the temptation of tapping into the coil power lead... it tends to do weird things due to decreased voltage/current in the ignition system. Unfortunately, I don't have a schematic handy to find a suitable power donor for a car that didn't have an electric choke from the factory.

I'm not sure if that really helped much.

 

[rumblefish360]

You'll need to run down to Radio Shack... for example and grab some wire and spade ends that fit the tab on the choke housing.

Next, you'll need a test light to test what wire you can tap into for a 12 volt source to power the choke.
This wire should be live only when the key is in and turned to start and/or on. When the key is out and in your pocket, the wire should be dead, no power.

What does an electric choke do

The electric choke closes the flap above the carb (Primary side) in order to "Choke" the carb. It allows only so much air in as well as speeds it up.
To much cold air runs the engine to lean in order to run, hence why you stall. Theres to much air.

Once the engine warms up, the air entering the engine expands to rebalance out the air and fuel ratio to a level of which the engine can run on.