Ford E6AZ-9D475-B Valve - Exhaust Gas

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The three types are conventional ported vacuum, the integral backpressure valve, and the Electronic EGR (EEGR) system.

Yes, in fuel-injected systems, additional checks include evaluating the Exhaust Valve Regulator (EVR) solenoid and examining the Exhaust Valve Position (EVP) sensor circuit.

The purpose of the emission control system is to regulate exhaust gas recirculation (EGR) in vehicles with carbureted and fuel-injected engines.

The EGR system is designed to lower combustion temperatures and reduce the formation of Oxides of Nitrogen (NOx) by reintroducing exhaust gases into the combustion chambers.

Replacements of other components related to the air inlet control, deceleration throttle control, intake manifold heating, PCV system, and catalytic converter typically involve disconnecting wires and hoses, removing faulty components, and installing new ones as needed.

The operation of the EGR valve is controlled by a vacuum-activated diaphragm built into the valve.

To maintain the EGR valve for vehicles with EEGR, you should unplug the electrical connector from the EGR valve position sensor, unscrew the threaded fitting for the external exhaust supply tube (if present), remove the vacuum line and mounting bolts, detach the valve, and replace the gasket. If replacing the EGR valve without the position sensor, transfer the sensor to the new valve with a new O-ring.