Exhaust Gas Recirculation: Description and Operation

Fig. 31 Exhaust gas recirculation system.:

On these vehicles, recirculation gas is drawn from the exhaust manifold to the EGR valve and through a stainless steel pipe into the intake manifold. The system, Fig. 31, consists of an EGR valve, thermo switch, a vacuum switching valve, an EGR controller, an engine speed sensor and a control lever position sensor.