Operation CHARM
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Ford Truck
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1989
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E 250 Van L6-300 4.9L
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Repair and Diagnosis
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Powertrain Management
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Emission Control Systems
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Description and Operation
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Vacuum Related Components
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Vacuum Reservoir
Vacuum Reservoir
Vacuum Reservoirs:
The Vacuum Reservoir stores vacuum and provides "muscle" vacuum. It prevents rapid fluctuations or sudden drops in a vacuum signal such as those seen during an acceleration period.