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Home >> Ford >> 1981 >> Courier 2.3L Eng VIN 2, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Exhaust Gas RECIRCULATION >> Testing >> Ported Vacuum Switch >> PVS with 2 Connections
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PVS with 2 Connections

  1. Detach both vacuum hoses from PVS and connect a vacuum gauge to top port on PVS. Connect other PVS nipple to manifold vacuum or external vacuum supply of at least 10 in. Hg.
  2. Start engine and warm up until PVS opening temperature is reached. See chart. If no vacuum reading is noted, PVS should be replaced. If vacuum is present, PVS is okay.
    Fig 1: Sectional View of 2-Port PVS
    G09337138Courtesy of FORD MOTOR CO.
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