EGR Vacuum Regulator (EVR) Solenoid
WARNING: This page is about a different car, the 1995 Ford Pickup, 1995 Ford F-Super Duty, and 1995 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
EVR solenoid controls vacuum output to EGR valve. When EVR solenoid is de-energized, solenoid valve opens, allowing manifold vacuum to be applied to EGR valve. When solenoid valve is energized, solenoid valve is closed and vacuum is vented to atmosphere.