How to check a gm mafs

[danyz250f]

Does any body know how to check a gm mafs? I just want to make sure it works before I put it in my car.

 

[malcvr4]

I'm sure theres a technical way to test the GM maf but I have no clue what that is. But the car will run with intake pipes off of the meter. Maybe you could plug it in without fully installing it and make sure the car will idle. Or you could check in a GM service manual at the auto part store (dont buy it) and see what it says. Good luck

 

[DSMcamaro]

Look inside it and make sure none of the little wire/transistor things are broken. It's not guaranteed to work if they are still in good shape, but its an easy way to spot a junker.

 

[Marc91GSX]

Pulled from this site:

http://www.aicautosite.com/garage/encyclop/ency13e.asp


The basic GM MAF test is nothing if not straightforward: When tapped with a tool (a screwdriver, not a sledgehammer) at idle, a bad sensor will not only produce a dramatic change in frequency, it may also cause the engine to stumble or stall. This is certainly a convenient check, and one GM expert I know says it's almost 100% accurate. You might even want to try it before pulling codes.