D 150 Pickup V8-360 5.9L VIN W (1987)
Thermal Vacuum Valve: Description and Operation
Fig. 15 Thermal ignition distributor control (TIDC) valve
This valve, Fig. 15, is used on 1986-87 models equipped with the V8-360 engine. This valve directs manifold vacuum to the distributor when the
engine is cold. When engine coolant temperature has reached 150°F, the valve will direct ported vacuum to the distributor vacuum advance unit.
