Exhaust Gas RECIRCULATION (EGR) System - Fiesta: Operation

Above a predetermined vacuum level, the exhaust gas recirculation (EGR) valve is opened. Exhaust gas is allowed to flow from the exhaust gas passages through a stainless steel tube and into the passages in the intake manifold. At lower vacuum levels, no recirculation takes place, since the valve is closed and gas cannot reach the intake manifold.