EGR Valve: Description and Operation

EVP EGR Valve:

The Exhaust Gas Recirculation (EGR) valve is actuated and controlled by vacuum, supplied from the EGR Vacuum Regulator (EVR) solenoid. When vacuum from the EVR solenoid overcomes diaphragm spring pressure, the diaphragm lifts the pintle valve from its seat, allowing exhaust gases to recirculate. The PCM regulates EGR flow based on engine load, temperature, and current EGR valve opening and/or flow.