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1990
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Grand Caravan V6-181 3.0L SOHC
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Manifold Pressure/Vacuum Sensor
Manifold Pressure/Vacuum Sensor
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.