A few notes about the q-jet. Yes, you must tap the gas to release the choke when the engine warms up or else your choke will just stay on and the idle will get higher and higher. You must also tap the gas before you start to set the choke. Your secondaries are blocked shut by the choke and will not be available until after the engine warms up. If you fiddle with the linkages on the passenger side of the carb and pull back on the trottle, you should be able to release the secondaries and they will open.

Q-jets meter fuel based on vacuum? So if there were a vacuum leak, vacuum would drop and fuel output would be increased. If vacuum gets low enough, the power valve opens. This would cause the engine to run fast and rich, though I think it would be less of a problem as you opened up the throttle.