Throttle Valve Switch

Throttle valve switch, if equipped, is attached to throttle chamber. Accelerator pedal movement activates the switch which has 2 sets of contact points. One set of contacts monitor idle position, while the other monitors full throttle position. Idle contacts close when throttle valve is positioned at idle and open when it is at any other position. Full throttle contacts close only when throttle valve is positioned at full throttle (at more than 34 degree opening of valve). Throttle valve switch compensates for enrichment at idle and after idle, and at full throttle positions. Idle circuit of switch also is responsible for sending out the fuel cut-off signal.