MAF problem

It might not be the maf because the motor has to be under load to draw enough air through to really measure, so you would have to probe the maf and have wires long enough to bring the voltmeter inside the car and read it while you were driving, or buy an obd-II scanner that gives live data readings from the sensors which is about $300 bucks. Only then will you get an accurate reading off of the maf.