EGR Control Solenoid
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 1985 Ford Ranger, 1985 Ford RV Cutaway, 1985 Ford Pickup, 1985 Ford Econoline, and 1985 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
Solenoid switches manifold vacuum to operate EGR valve on command from ECA. Vacuum opens EGR valve when solenoid is energized.