Location of EGR Control Solenoid for F 350 4WD Pickup V8-351 58L VIN G 2-bbl (1985)
EGR Control Solenoid: Description and Operation
The dual EGR solenoid valve assembly consists of two dithering solenoid valves. The first is a vacuum valve which supplies vacuum to the sonic EGR
valve when energized. The second is a vent valve which vents the EGR valve to the atmosphere when de-energized. Both solenoid valves receive
variable duty cycle signals from the ECA according to EGR requirements. A restrictor is added in the vacuum valve inlet port to reduce its flow
compared to that of the vent valve so that when vacuum valve sticks open, the vent valve can immediately vent the vacuum valve flow without affecting
the devices being controlled.
