W250 3/4 Ton Pickup 4WD V8-318 5.2L VIN T 2-BBL (1983)
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Manifold Pressure/Vacuum Sensor: Specifications
All models with TBI.
Apply 5" (125mm) Hg to unit and record output voltage. Apply 20" (500mm) Hg to unit, the difference in voltage should be 2.3 - 2.9.