If the choke is fully closed, the fast idle screw is on the high step of the cam. Once you pump it to set the choke do not hit the throttle. If the vacuum pull off (dashpot) is adjusted so it pulls the choke open to far, then the next time you hit the throttle it'll knock the fast idle cam down a notch or more. Are the bowls full when you go to start (electric pump?). If not the modern fuels evaporate quickly. The bowls may be empty. No electric pump? Crank the motor to fill the bowls. Then set the choke with one pump. It should start right up and fast idle.
Doug
Just like Doug says. Even if you pump the pedal 4 times dont start the car until you stop pumping the pedal and on the last pump be sure to push the pedal at least half way down so the choke still sets. Most cars that have a good pump shot only need the gas pedal pressed to the floor once and then release the pedal and start the car. It will be on the high step of the fast idle cam if everything is adjusted right. Then after it starts you can tap the gas in a minute or so and it should drop to the next step on the cam if the choke pulloff is adjusted right. With two carbs you may need to pump it a few times to start. Like Doug said if it loads up when started check the choke pulloff adjustment so its not to rich. Ron
