Electric PVS High Temp Coolant Lock Out Vacuum

1975-82 Vehicles With Catalytic Converter

1. Disconnect vacuum line from air bypass valve to PVS valve at air bypass valve and connect to vacuum gauge.

2. With transmission in Park or Neutral and parking brake applied, start engine and allow to idle.

3. With engine at normal operating temperature, there should be a vacuum reading. If not, PVS is defective and should be replaced.