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Home >> Ford >> 1981 >> Courier 2.3L Eng VIN 2, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Deceleration Control System >> Testing >> Throttle Positioner >> System Test
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System Test

  1. Start engine and set idle speed. Remove black/white or brown/red wire (as equipped) from 3-way solenoid. Engine speed should increase to 1000 RPM (Federal) or 1100 RPM (Calif.).
  2. If not, 3-way solenoid or servo diaphragm is improperly operating. See "Servo Diaphragm" testing below.  Replace units as required.
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