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Meter Tester
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How to test a MAF from a 2004 2.0 volkswagen Jetta by using a multi-tester meter?
It would be very tough to test the MAF with a multimeter unless it is completely dead. Typically a technician will hook a laptop up to the OBD2 connector on the car and look at the MAF voltage or coverted MAF reading in grams per second. As a rule of thumb the MAF should display 1 g/s for each brake horsepower the car has, so a 180 BHP car would max out at 180 g/s when measuring the MAF. At idle the front oxygen sensor usually takes the lead in dictating the air fuel ratio on the car, so multimeter reading on a stationary car may be inconclusive.