Pontiac Montana New Air Mass Sensor

A Mass Air Flow sensor, like its name, indicates measurements of air density that flows into the engine. It is one of the most critical injection system sensors in fuel. This sensor is inserted between the air filter and the engine intake manifold. It sends this measured information to the ECU(Electronic Control Unit), which then determines the amount of fuel to be sent in order to maintain the correct air / fuel ratio for the engine to operate optimally. Because the density varies with temperature, altitude and induction force, calculating the air density is very critical in sending the right amount of fuel into the combustion chamber.

The sensor has an incredibly easy and the most critical job for the efficiency of the car. It is used for measuring the density of air that flows into the engine. The ECU regulates the fuel supply to the combustion chamber on the basis of this sensed data, so that the engine is at its best possible output all the time.

The type of hot wire is the most widely used type of MAF sensor in automobiles. The sensor consists of a heating resistor, temperature sensor for intake of air, and a control circuit. A portion of intake air is sent to the measurement area of the hot-wire where the intake volume is measured. The hot wire is responsive to temperature changes. The resistance change and current flow are converted to a proportional signal and then forwarded into the ECU. The ECU then does the job of regulating the ratio of air fuels.

The sensor fits in between the engine air filter and intake manifold.