Skylark V6-173 2.8L VIN X 2-bbl (1984)
Distributor Vacuum Control: Description and Operation
Electronic Module Retard-Vacuum Switch (EMR-VS)
The electrical contacts of this switch are normally closed. When the TVS directs vacuum to the EMR-VS, the contacts close and complete the circuit
to ground. The circuit is energized when 4 or more inches Hg are applied and de-energized when vacuum is reduced to 5.75 inches Hg or less.
