Exhaust Gas RECIRCULATION: Description
The exhaust gas recirculation (EGR) system is used to reduce NOx emissions by recycling metered amounts of exhaust gas back into the intake/combustion system. This is done through a vacuum-controlled EGR valve which responds to a vacuum signal from the throttle housing. This signal is determined by the position of the throttle plate.
System consists of an EGR valve, temperature control valve, vacuum amplifier, vacuum delay valve (auto, trans, only) and a vacuum reservoir.