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Home >> Mercury >> 1999 >> Villager Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Devices >> Manifold Absolute Pressure/Barometric Pressure (MAP/BARO) Sensor

Manifold Absolute Pressure/Barometric Pressure (MAP/BARO) Sensor

This combination sensor alternately senses engine vacuum and ambient air pressure. PCM uses these signals to determine fuel mixture and EVAP operation.

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