[ddsmith]

The electric chokes are typically designed to function with a fully functional heat stove. Unfortunately they are normally long gone. In a correctly functioning system, the 12v that goes to the electric choke causes full choke off in about 1 1/2 to 2 min. If you think about that, you quickly understand why electric choke vehicles without the heat stove frequently have cold run problems. If the stove is still in tact there is a thermostatic valve on the air cleaner housing which causes a air valve to shift and draw air from the heat stove which is warmed by the exhaust manifold. The exhaust heats up far quicker than the engine. This provides warm air to the carb so when the electric choke comes fully off the warm air ensures proper fuel atomization. The thermostatic valve modulates the air valve to keep somewhat warm air going to the engine. Not necessarily the best thing for horsepower but very good for cold engine operation.