Exhaust Gas RECIRCULATION: Description

The exhaust gas recirculation (EGR) system is used to help control formation of NOx emissions. By recycling some exhaust gas from the exhaust ports back to the intake system, combustion temperatures are lowered, which helps keep NOx emission down. System consists of EGR valve, EGR pipe, thermal vacuum valve and control valve orifice (2-WD Man. Trans. only).