Idle Up Control Valve: Description and Operation

Fig. 19 Throttle opener system. 1982-86 models except 1982 Champ & Colt (federal) w/1400cc engine & manual transaxle:

1982-88 Models exc. 1982 Champ & Colt (federal) w/1400cc engines & manual transaxle

This system, Fig. 19, consists of a throttle opener assembly, a solenoid valve, an engine speed sensor and the air conditioning compressor switch.
When the compressor is switched on, the speed sensor detects a drop in engine speed, and activates the solenoid valve. The solenoid valve then transfers intake manifold vacuum to the throttle opener, which opens the throttle valve via the throttle opener lever. The engine speed, therefore, is balanced against the air conditioning compressor load, resulting in improved idle and decreased levels of exhaust pollutants.