Tempo L4-140 2.3L HSC (1986)
Exhaust Pressure Regulator Vacuum Valve: Description and Operation
The Electronic Vacuum Regulator (EVR) is an electromagnetic device which controls vacuum out-put to the EGR valve. The EVR replaces the EGR
Solenoid Vacuum Vent Valve Assembly (9D474). An electric current in the coil induces a magnetic field in the armature. The magnetic field pushes
against a spring loaded disc increasing the vacuum level. The vacuum source is either manifold or port vacuum. As the current is increased an increased
vacuum signal goes to the EGR.
