Spirit R/T L4-135 2213cc 2.2L DOHC Turbo VIN A FI (1992)
Barometric Pressure Sensor: Description and Operation
Map And Baro Read Solenoid Location
Location
Solenoid mounted under hood on passenger side of firewall, near MAP sensor.
Purpose
Solenoid switches manifold or barometric (atmospheric) pressure to MAP sensor.
Powertrain Control Module (PCM) uses barometric reference for turbo boost and cold start fuel enrichment at altitudes.
PCM uses manifold vacuum to judge engine load.
Operation
Solenoid energized, MAP sensor receives atmospheric pressure.
Solenoid de-energized, MAP sensor receives manifold pressure (vacuum).
PCM energizes solenoid once per throttle closure, but no more than once per three minutes and only within a specified rpm range.
