What Does A Map Sensor Do
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What Does A Map Sensor Do. When the throttle is wide open and air is rushing into the intake manifold (causing a drop in pressure), the map sensor signals the engine computer to send more fuel. The data is used to calculate air density and determine the engine’s air mass flow rate, which in turn determines the required fuel delivery for perfect combustion.dec 18, 2019
This data is the basis for fuel delivery and timing control. Poor fuel economy is a major concern. The manifold absolute pressure (map) sensor is used by the powertrain control module (pcm) for engine load input.
Symptoms that happen when the absolute pressure (map) sensor in your vehicle fails a low manifold absolute pressure (map) sensor can result in improper fuel delivery and ignition timing.
Basically, a map sensor reads the amount of air pressure in relation to vacuum inside the intake manifold, either directly or using a vacuum hose. This allows the vehicle’s computer to tinker with ignition timing, work out air density, and adjust fuel delivery. The map sensor converts engine vacuum/manifold pressure to an electrical signal so the computer knows how much load the engine is under. Here are the specifics of how the map sensor functions:
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