Dual EGR System Control Valve: 2.6L
Dual EGR system has primary and secondary valves which respond to different carburetor vacuums in response to throttle openings. EGR operation is suspended at idle and wide open throttle.
Primary valve controls EGR flow at relatively small throttle opening angles. Secondary control valve allows recirculation of exhaust gas into intake mixture at larger throttle opening angles.
Vacuum applied to dual EGR control valve is controlled by thermo valve. Sub-EGR valve is directly opened and closed with motion of throttle valve through mechanical linkage. Two thermo valves sense coolant temperature at intake manifold and prevent operation of dual EGR valve below preset temperature of thermo valve.