Hmmm?
Is the connection tight? Are the wires inside the MAF damaged or bent?
The MAF uses a "hot Wire" tech.
Maybe this will help you understand better and pinpoint the problem. The MAF measures the humidity and volume of air going into the motor.
http://www.kemparts.com/TechTalk/tt06.asp
You said you bought a new one, maybe it's bad, or the wrong size for the car
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