Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1986AEROSTAR V6-183 3.0LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTEMISSION CONTROL SYSTEMSEXHAUST GAS RECIRCULATIONEGR CONTROL SOLENOIDDESCRIPTION AND OPERATION
1986 Ford Aerostar V6-183 3.0L
EGR Control Solenoid: Description and Operation
1986 Ford Aerostar V6-183 3.0LSECTION Description and Operation
EGR solenoid valve assembly (dithering type):
Dithering Type
The dual EGR solenoid valve assembly consists of two dithering solenoid valves. One is a vacuum valve which supplies vacuum to the sonic EGR valve when energized. The second valve is a vent valve which vents the EGR valve to the atmosphere when de-energized. Both solenoid valves receive variable duty cycle signals from ECU (EEC IV) according to EGR requirements. A restrictor is added in vacuum valve inlet port to reduce its flow compared to vent valve. So in case vacuum valve sticks open, the vent valve will be capable of venting the vacuum flow immediately without affecting the devices being controlled.
It is used with the EGR valve in EEC IV systems.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.