B250 3/4 Ton Van L6-225 3.7L VIN H 1-bbl (1987)
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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.