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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 3 Connections

PVS with 3 Connections

  1. Disconnect EGR vacuum hose from PVS and connect manifold vacuum or external vacuum source to lowest port on PVS.
  2. Detach distributor supply hose from center port and attach vacuum gauge to center port.
  3. Start engine and warm up until PVS opening temperature is reached. See chart  . If no vacuum is present, replace PVS. If present, PVS is okay.
    Fig 1: Sectional View of 3-Port PVS
    G09337139Courtesy of FORD MOTOR CO.
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