EGR Early Fuel Evaporation TVS

Below the switching point;
- EFE and Manifold Vacuum ports should be open
- EGR and Ported Vacuum ports should be opened and vented through the Vent port
- Vent port should be blocked to the EFE port

Above the switching point;
- Manifold Vacuum Port--Should be blocked
- EFE port should be vented at the Vent port
- EGR and Ported Vacuum ports should be open, while the Vent port is blocked at the EGR port.

NOTE: Refer to the number stamped on the base of the switch or valve for calibrated switching or activation temperatures.