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Home >> Ford >> 1988 >> Aerostar Van Window, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Deceleration Control System >> Testing >> System Quick Check

System Quick Check

  1. With engine at idle, accelerate to 2000 RPM or more, then let it return to idle. Manifold vacuum should exceed 20.6 in. Hg since system includes a vacuum solenoid valve.
  2. If vacuum diaphragm plunger extends and retracts, system is functioning properly. If not, continue with tests in sequence given.
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