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Home › Chevrolet › 1987 › Spectrum Express › Repair and Diagnosis › Engine Performance › System › Air Injection System › Component Testing › Vacuum Switching Valve (VSV)

Vacuum Switching Valve (VSV)

  1. Apply battery voltage to VSV. Air should flow freely through ports A and B of valve.
  2. Remove voltage from VSV. Air should not flow through ports A and B of valve. Replace VSV if not performing as specified.
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