Dakota 2WD V6-3.9L VIN X (1997)
Cruise Control Vacuum Reservoir: Description and Operation
SYSTEM OPERATION
The vacuum reservoir is located under the cowl intake air screen in the cowl plenum. The reservoir contains a one-way check valve to trap engine
vacuum in the reservoir. When engine vacuum drops, as in climbing a grade while driving, the reservoir supplies the vacuum needed to maintain
proper speed control operation. The vacuum reservoir cannot be repaired and must be replaced if faulty.
