Description & Operation: Notes

The Exhaust Gas Recirculation (EGR) system is designed to lower peak combustion temperatures of gases in the combustion chambers due to lower concentrations of oxygen in the intake mixture, and thereby reducing formation of oxides of nitrogen (NOx).

This reduction of peak combustion temperatures is accomplished by introducing metered amounts of exhaust gas into the air/fuel mixture. The EGR system used on the 2.5L and 3.0L engines is controlled by the Electronic Control Unit (ECU). This system consists of a diaphragm actuated EGR valve, EGR valve solenoid, EGR backpressure transducer, connecting vacuum hoses and ECU.