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Manifold Absolute Pressure (MAP) Sensor

This MAP sensor is used to compensate for inaccurate mass air flow input signals that can vary during rapid throttle changes. MAP sensor receives a 5 volt reference signal from ECM and returns a varying analog voltage depending on intake manifold pressure. MAP sensor is also used to modify pulse-width modulation of EVAP canister purge valve during changes in manifold vacuum/pressure.

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