Okay, I found the source, have good vacuum, now it seems that the little manifold that directs vacuum to the various pots does not function. The plug going in to it has current on all but 1 point, and it also appears that someone has had it out/worked on it, as it has electrical tape holding it together, it has that "been taken apart" look, I'll do the same and look for bad elec. connections, and also apply external vacuum to it, work the switches and see if it directs vacuum. Anybody have a diagram of switch position/vacuum manifold relationship?