Thermal Ignition Distributor Control Valve (TIDC)

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.