how to tell is maf is pegged or bad?

[dragnazz5.0]

i dont get any codes for the maf but im wondering if its pegged and not reading correctly. do i just need to probe the signal wire and look at the voltage or what. ive got a chart that has all the voltage readings. its a 94-95 maf.

 

[vristang]

Other than datalogging while the car is running, I have no idea how you would do that.

jason

 

[jrichker]

The wire colors are for 89-90, other model years may use different colors.

The MAF output varies with RPM which causes the airflow to increase or decease. The increase of air across the MAF sensor element causes it to cool, allowing more voltage to pass and telling the computer to increase the fuel flow. A decrease in airflow causes the MAF sensor element to get warmer, decreasing the voltage and reducing the fuel flow. Measure the MAF output at pins C & D on the MAF connector (dark blue/orange and tan/light blue) or at pins 50 & 9 on the computer.

At idle = approximately .6 volt
20 MPH = approximately 1.10 volt
40 MPH = approximately 1.70 volt
60 MPH = approximately 2.10 volt

 

[dragnazz5.0]

The wire colors are for 89-90, other model years may use different colors.

The MAF output varies with RPM which causes the airflow to increase or decease. The increase of air across the MAF sensor element causes it to cool, allowing more voltage to pass and telling the computer to increase the fuel flow. A decrease in airflow causes the MAF sensor element to get warmer, decreasing the voltage and reducing the fuel flow. Measure the MAF output at pins C & D on the MAF connector (dark blue/orange and tan/light blue) or at pins 50 & 9 on the computer.

At idle = approximately .6 volt
20 MPH = approximately 1.10 volt
40 MPH = approximately 1.70 volt
60 MPH = approximately 2.10 volt

yeah, i know how they work, i just didnt know if there was a way to measure it without having some sophisticated equipment