Spirit L6-258 4.2L VIN C 2-bbl (1982)
Vacuum Switch: Description and Operation
Description
The 4 inch Hg vacuum switch is controlled by carburetor ported vacuum and has a normally closed electrical contact that indicates a closed
throttle condition. The switch is opened by a 4 inch Hg vacuum level.
The 10 inch Hg vacuum switch is controlled by manifold vacuum. When open, the switch indicates a deep throttle condition, a non-cruise engine
operating condition.
