PL720 4WD L4-2389cc 2.4L SOHC (Z24) (1983)
Throttle Position Switch: Description and Operation
Full Throttle Vacuum Switch, Carbureted
Fig. 5 Full throttle vacuum switch
The full throttle vacuum switch, Fig. 5, senses low intake manifold vacuum and transmits a corresponding electric signal to the ECC control unit. The
vacuum switch turns on when intake manifold decreases around full throttle or under heavy load.