Fuego

Fig. 8 Exhaust gas recirculation (EGR) system.:

The EGR valve (1), Fig. 8, is controlled by intake manifold vacuum. Exhaust gas recirculation is only possible when the solenoid (2), Fig. 8, is energized. This can be accomplished only when the following conditions are met: when fifth gear is not engaged (switch (3), Fig. 8, is open in fifth gear); coolant temperature is above 113°F (coolant temperature switch (4), Fig. 8, is closed); the pressure differential switch (5), Fig. 8, is electrically fed (chamber A vacuum greater than chamber B vacuum, Fig. 8.)