EGR Valve - Electronic

The Electronic EGR Valve, is required in EEC systems where EGR flow is controlled according to computer demands by means of an EGR valve position (EVP) sensor attached to the valve.


The valve is operated by a vacuum signal from the dual EGR Solenoid Valves (9D474) or the electronic vacuum regulator (9J459) which actuates the valve diaphragm.


As supply vacuum overcomes the spring load the diaphragm is actuated which lifts the pintle off its seat allowing exhaust gas to recirculate (flow). The amount of flow is proportional to the pintle position The EVP sensor mounted on the valve sends an electrical signal of its position to the Electronic Control Assembly (12A650).


The Electronic EGR Valve Assembly (9F483) is not serviceable. The EVP sensor (9G428) and EGR valve (9H473) must be serviced separately.