[Mark Yacavone]

This one's on the way, via Buster Brown, but we might want to mention there is a secondary accelerator pump circuit. This was discussed in an earlier thread.
My experience is that you just can't take a Qjet that is being booted off the line, and then use it with a 2 step. If your spring is tight and your vacuum break is of the slow variety, you may be pulling fuel out of the secondary circuit.
The biggest eye opener for me was to have the driver mat it while watching with the hood open. In my mind, if the secondary flap is not WFO when releasing the brake or button, then consistency and efficiency will suffer.