W Sprint/Caballero V8-305 5.0L (1982)
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Cruise Control Servo: Testing and Inspection
1.
Disconnect vacuum hose from servo and apply approximately 14 inches of vacuum to servo using a suitable pump with an integral gauge.
2.
If servo loses more than 5 inches of vacuum in 1 minute, servo is defective. Connecting vacuum hoses can be checked using a similar test
procedure.