what does a maf sensor do???

[V6UnderPressure]

Gotta make a technical description for school.

Scott

 

[boostx]

http://www.sdsefi.com/techtheo.htm

 

[TurboJim]

A hot wire MAF works by:

The sensor heats the wire/resistor to ~600*F. The airflow across the resistor/wire cools off the resistor. The MAF then increases PW or current to get the resistor back to 600*. The current it takes to get to the target temp is measured. This measurement tells the ECM how much air is flowing.

BTW: I'm not positive of the temp, although I DO KNOW the MAF tries to keep the wire/resistor at a target temp. The current it takes is converted to airflow.

This is a hot wire type. A vane airflow meter has a door and this door is connected to a potentiometer. The door opens more under higher airflow, and the pot sends a voltage back to the ECM indicating airflow.

Enough to get you started?