What is map sensor on 95 astro do?

The MAP (Manifold Absolute Pressure) sensor on a 1995 Chevrolet Astro van measures the pressure within the intake manifold. This data is crucial for the engine control unit (ECU) to calculate the air density and determine the appropriate fuel-to-air ratio for optimal combustion. A malfunctioning MAP sensor can lead to poor engine performance, reduced fuel efficiency, and increased emissions.