Fast Idling System
See Fig 1. Switch "A", on transmission, is closed when third or fourth gears are engaged. Switch "B", installed close to clutch pedal, is closed when pedal is released. When both switches are closed (in third or fourth gear with clutch pedal released) solenoid valve "E" is energized and vacuum from intake manifold actuates fast idling diaphragm unit "H", on carburetor. When transmission is in any gear other than third or fourth, or if clutch pedal is depressed, fast idling device is inoperative. As a result, when vehicle is standing still with engine idling, switch "A" is open. However, a push-button switch "C", mounted on firewall or sidewall of engine compartment depending on car model, allows solenoid valve "E" to be energized in order to adjust fast idling speed. Adjustment is obtained through adjustment screw "G" on vacuum diaphragm unit. This system is fused through windshield wiper circuit, thus, if wiper circuit is in operative, emission device will not function.