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Vacuum Control Valve Cressida

  1. Remove VCV. Blow air into port "S" checking that air flows to port "Z". Blow air into port "Y" checking that air does not flow to any other port.
  2. Connect a vacuum gauge to hose leading to port "S" and apply more than 16.2 in. Hg. Connect another vacuum gauge to hose leading to port "Z". Check that port "Z" vacuum gauge indicates 9.7-12.6 in. Hg.
  3. Increase vacuum to port "S" to more than 18.1 in. Hg. Check that port "Z" vacuum gauge indicates 2.1-4.5 in. Hg.
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