Light Duty

EGR Valve:

PURPOSE
The EGR system lowers the formation of nitrogen oxides by reducing combustion temperature. This is done by introducing exhaust gases into the cylinders through the EGR valve.

OPERATION
The EGR valve introduces the exhaust gases to the incoming fresh air at the engine crossover.

A vacuum pump is used to supply the EGR with vacuum. The DEC system utilizes an ECM/PCM which controls a set of solenoids which in turn control the EGR valve. A MAP sensor is used to measure the amount of absolute pressure in the EGR vacuum line.

LOCATION
The EGR valve is mounted on the fresh air inlet of the intake manifold.