Yeah, do put some gas in. Then begin from scratch checking systems. When you first press the gas pedal on a cold motor the carb choke closes and the fast idle kicks in. Then when you start the motor it runs fast because it is cold and needs extra gas and throttle opening. At the same time an open vacuum switch sends manifold vacuum to the EFE valve and closes it. That shuts off the exhaust flow on one side and forces the exhaust gas through a passage way in the intake manifold that passes under the carb- heating it up faster. Also at the same time a manifold vacuum line that goes to the air cleaner closes a flap in the snorkel. That causes the intake air to come from the hot air tube on the exhaust manifold. That flap stays closed until a sensor in the air cleaner detects about 100° air and then the flap opens to regulate the intake air for that temperature. The EFE vacuum switch closes, vents, and then the EFE valve opens when the engine temps reach about 100°. Then both exhaust manifolds flow freely out the exhaust pipes. As the motor warms up, the choke opens. When you tap the gas the fast idle disengages and the idle drops down. Why is this all needed? Because the carburetor is calibrated to run best with 100° intake air and a 195° engine temperature. When stuff is missing or disconnected, the motor takes a long time to stabilize, if at all.
