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E 350 Van V8-351 5.8L
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Idle Speed/Throttle Actuator - Mechanical
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Description and Operation
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Vacuum Operated Throttle Modulator (VOTM)
Vacuum Operated Throttle Modulator (VOTM)
Fig. 33 Vacuum operated throttle modulator (VOTM):
The VOTM,
Fig. 33,
used on some vehicles acts as a variable
carburetor
stop. The plunger extends when vacuum is applied.