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Vacuum Supply

  1. Disconnect vacuum hose at cruise control servo. Install vacuum gauge to disconnected vacuum hose. Start engine and observe gauge. Vacuum reading should be a minimum of 10 in. Hg. Turn engine off. Vacuum should continue to hold at a minimum of 10 in. Hg.
  2. If vacuum is not as specified, check for kinked or leaking vacuum lines, defective check valve, defective vacuum reservoir and/or poor engine performance. If no problems are found, check cruise control servo. See CRUISE CONTROL SERVO  under TESTING (WITHOUT DRB).
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