B Series Truck 2WD L4-2184cc 2.2L 2200 2-bbl (1990)
Manifold Pressure/Vacuum Sensor: Description and Operation
Vacuum Sensor
The Vacuum Sensor detects changes in intake manifold vacuum under various operating conditions. The changes are converted to an electrical signal
monitored by the ECU as an input related to engine load. With the engine not running (atmospheric pressure), the signal is approximately 4V. At idle
(high vacuum), the signal is approximately 1.3V.
