EGR Valve

EGR valve is mounted on intake manifold. Exhaust gas is drawn from exhaust crossover passage or exhaust manifold. There are 2 types of EGR valves used: valves without backpressure sensors and valves with integral backpressure sensors.

EGR Valve Backpressure Sensor (4.0L Only) - EGR valves are calibrated by use of different shapes of valve pintles or orifices. Valve is normally held closed by spring pressure (above diaphragm). Valve opens by overcoming its spring tension when vacuum is applied.