Exhaust Gas RECIRCULATION: Description

Exhaust gas recirculation (EGR) system is used to help control formation of NOx emissions. By recycling some exhaust gas from exhaust ports back to intake system, combustion temperatures are lowered, which helps keep NOx emissions down.

System consists of EGR valve, EGR pipe, thermal vacuum valve and control valve orifice (except Auto. Trans. and 4-WD models with Hitachi carburetors).