LTD L4-140 2.3L VIN A 2-bbl (1984)
Idle Speed/Throttle Actuator - Mechanical: Description and Operation
Vacuum Operated Throttle Modulator (VOTM)
Fig. 24 Vacuum operated throttle modulator (VOTM)
The VOTM, Fig. 24, acts as a variable carburetor stop. The plunger extends when vacuum is applied.