Electra Estate Wagon V8-307 5.0L (1982)
Thermal Vacuum Valve: Testing and Inspection
EFE Thermal Vacuum Switch (EFE-TVS)
1. Start engine and allow it to reach normal operating temperature.
2. With transmission in Park or Neutral, disconnect vacuum hose from EFE and check for vacuum. No vacuum should be available. If vacuum is
present, replace switch.
NOTE: Refer to the number stamped on the base of the switch or valve for calibrated switching or activation temperatures.