EGR System - Gasoline: Description

Exhaust gas recirculation system is used to reduce oxides of nitrogen (NOx) by recycling some exhaust gas back into the intake manifold to lower combustion chamber temperatures.

On I-Mark and P'UP models, EGR valve is mounted under intake manifold. On Impulse models, EGR valve is located behind intake manifold. EGR system consists of an EGR valve, a back pressure transducer which monitors exhaust system pressure and a thermal vacuum valve which senses coolant temperature.