Firebird V8-305 5.0L (1982)
Distributor Retard Control: Description and Operation
Electronic Module Retard-Vacuum Switch (EMR-VS)
OPERATION
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.
