Manifold Pressure/Vacuum Sensor

Manifold pressure Voltage specifications*

5 in Hg (125 mm Hg) 2.5 Volts
10 in Hg (250 mm Hg) 2.0 Volts
15 in Hg (375 mm Hg) 1.5 Volts
20 in Hg (500 mm Hg) 1.0 Volts
25 in Hg (625 mm Hg) 0.5 Volts

*Measured at Engine Control Module (ECM) terminals D17 (+) and D21 (-).