1976-78 Models

Every 12, 500 miles the EGR warning lamp on instrument panel will come on. When lamp comes on, the EGR valve should be inspected and tested, after servicing EGR system, the EGR warning lamp switch should be reset.
To reset switch, remove EGR switch cover. Switch is located behind speedometer. Slide switch knob in the opposite direction and the lamp will go out. Every 25, 000 miles, the EGR valve should be removed and cleaned.

Fig 1: 1979 EGR System For 2.0L Engines (Federal)
Courtesy of FORD MOTOR CO.

Fig 2: 1979 2.0L Engine EGR System (Calif.)
Courtesy of FORD MOTOR CO.

Fig 3: 1979 2.3L Engine EGR System (Federal)
Courtesy of FORD MOTOR CO.

Fig 4: 1979 2.3L Engine EGR System (Calif.)
Courtesy of FORD MOTOR CO.