The Edlebrock electric choke specifically is designed to have +12 volts applied to it during ignition run, or “key on”. Refer to the instructions that came with it or do quick search on the net. In most cases, in most climates, engine operating temperature only is insufficient to keep the choke spring completely relaxed for the duration of the run cycle and requires voltage to the heating element to do so.

From Edlebrock tech support;

“Q: How do I hook up my electric choke (voltage)?

A: The Electric choke on our Performer Series and AVS carburetors needs to be hooked to a “keyed” (while the key is in the on position) 12-volt power source, with a good ground. Verify there is no voltage when the key is in the off position. Do not connect the positive wire to the Ignition Coil, ballast resistor or Alternator.”

Note the warning about the coil and alternator. On 70’ and up isolated field Mopar alternators, “key-on +12volts” is present at one of the field terminals and one side of the ballast resistor.