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Home >> Ford >> 1981 >> Courier 2.3L Eng VIN 2, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Spark Timing Control System >> Testing >> Vacuum Delay Valve >> 2.3 Liter Engine (Calif. Man. Trans.)
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2.3 Liter Engine (Calif. Man. Trans.)

  1. Disconnect vacuum tube from vacuum delay valve at distributor solenoid valve. Connect a vacuum gauge to vacuum tube. See Fig 1.
    Fig 1: Spark Timing Control System Test Connections (2.3 Liter Engine - Calif. Man. Trans.)
    G09313843Courtesy of FORD MOTOR CO.
  2. Disconnect vacuum tube from vacuum delay valve at distributor vacuum advance unit. Connect tube to intake manifold. Start engine and record vacuum gauge reading at idle.
  3. Disconnect tube from intake manifold and check time required for vacuum gauge reading to decrease by 11.8 in. Hg. Specified time is 4-6 seconds. Replace valve if specifications are not met.
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