Posts Tagged: Speed density

MAP sensor — what it does

What does MAP sensor do A Manifold Absolute Pressure (MAP sensor) gives the engine’s computer data with which it can calculate the density of the incoming air. Calculating density is not as easy as it sounds. Sure, atmospheric pressure gives us some idea of the air’s weight. But remember, the engine is sucking in air, so it’s creating a vacuum. With atmospheric pressure pushing air into the engine and the pistons sucking air in, the computer really wants to know the difference between the two. That’s why the reading is … Read More