pontiac Workshop Repair Guides

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Vacuum Pump: Description and Operation

Fig. 2 Aspirator vacuum assist cruise control schematic

    Supplementary vacuum assist, Fig. 2, is used on some models to allow proper system operation under various driving conditions. An auxiliary vacuum
pump or aspirator is used to help supply additional vacuum to the cruise control system components at times of low engine vacuum.

Cruise Control > Vacuum Pump, Cruise Control > Component Information > Description and Operation

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