quote:Originally posted by Cowboy from Hell:
The 1972 motor only has 2 systems controlled by vacuum
(1) the distributor
(2) the heated air for the air cleaner assembly
In regards to the distributor.
I suppose you are aware the Pantera underwent constant detail changes during its early production (when DeTomaso was building them for Ford). One of the very early on-going changes was a temperature controlled switch, installed in the coolant system, that controlled distributor vacuum and the idle solenoid. The electric ported vacuum switch (aka the PVS valve) was both an electrical switch and a vacuum switch.
I'm not sure whether or not the Pantera you are working on is equipped with that switch. If it is, it is a notorious source of trouble that should not be utilized. I am sincere in advocating for the distributor controls to be simplified as indicated in the drawing in my last post.
In regards to the air cleaner controls
The diagram below will do the trick
-G
The engine I am working on has a vacuum block below the distributor with three ports. It does NOT have electrical connectors. One hose goes to a T, another to the vacuum advance in the dizzie, and the third goes somewhere else (I forget where for the moment). Then there are plenty of spots on the back of the engine for vacuum lines. I REALLY screwed up by not taking a picture when I tore things apart.