E 150 1/2 Ton Van V6-4.2L VIN 2 (1997)
EGR Valve: Description and Operation
Exhaust Gas Recirculation Valve
Purpose
The EGR valve increases or decreases the flow of exhaust gas recirculation.
Description
The EGR valve in the Differential Pressure Feedback EGR system is a conventional vacuum actuated EGR valve, and serves only as a pressure regulator
rather than a flow metering device.
Operation
As vacuum applied to the EGR valve diaphragm overcomes the spring force, the valve begins to open. As the vacuum signal weakens, the spring force
closes the valve.
