EGR System - Gasoline: Description

The Exhaust Gas Recirculation (EGR) system is designed to lower air/fuel mixture combustion temperature and reduce formation of oxides of nitrogen (NOx). A metered amount of exhaust gas is introduced into the intake manifold to dilute the air/fuel mixture.

The EGR system consists of an EGR valve, water thermo switch and sensor, vacuum sensor, duty solenoid valve, position sensor and vacuum delay valve (with A/T).