Posts Tagged: Speed density
Learn how a speed density air-fuel system works
A speed density air-fuel system works differently than a mass airflow system. Learn how it works and what can go wrong A speed-density air-fuel system is a type of electronic fuel injection system that calculates the amount of fuel to be delivered to the engine based on the engine’s speed and manifold absolute pressure (MAP). The system uses a MAP sensor to measure the air pressure in the intake manifold and the engine’s speed to calculate the engine’s airflow. The computer then uses this information to determine how much fuel … Read More
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