Thanks a bunch! I'll get the readings and post the results tomorrow afternoon.
Using the mighty vac... Do I just "T" into the line after the dash pot going to the VCV for the reading? Assuming the same for the line to the trans? What should those readings be?
The Alda system is fine. Lines are all clean, etc... That is not the "switchover valve" I am referring to. There is another "switchover valve" on the firewall about 5 inches away from the one that controls the Alda. This valve forms a loop in the vacuum system and has a wire running over to a sensor in the thermostat housing. In the diagram below, in the upper left corner, valve #125 is the valve I am referring to. The wire goes to sensor #20.
