Century Estate Wagon V6-260 4.3L DSL (1984)
Torque Converter Clutch: Description and Operation
These valves, used in EGR and TCC systems on diesel engines, function as quick acting vacuum release valves. As long as vacuum input to the valves
remains constant or is increasing, vacuum output is equal to vacuum input. However, if the vacuum input signal decreases, the vacuum output signal will
be vented until vacuum trapped within the operated device equalizes with input vacuum or input vacuum increases.
