Operation CHARM
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1987
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Riviera V6-231 3.8L
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Repair and Diagnosis
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Sensors and Switches
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Sensors and Switches - Powertrain Management
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Sensors and Switches - Computers and Control Systems
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Manifold Pressure/Vacuum Sensor
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Testing and Inspection
Manifold Pressure/Vacuum Sensor: Testing and Inspection
Fig. 7 Vacuum sensor diagnostic chart. All models with vacuum sensor (use this chart with EST diagnostic & performance charts):