EGR CTO Switch

This switch is located in coolant passage at right rear of intake manifold (4-cylinder) or on front left side of cylinder block (6-cylinder).

The inner port ("S") is connected to the EGR port at the carburetor. The outer port ("E") connects to the EGR valve or TVS. When coolant temperature is low, there is no vacuum signal to the EGR system. EGR operation will begin when coolant temperature reaches 100°F (4-cylinder models), 115°F (Federal and all Eagle 6-cylinder models) or 120°F (California 6-cylinder models).