how can i test my mafs

[jin3001]

car wont revpast 1800-2000rpm.been told over and over its my mafs.i have two mafs both are for this vehicle,tried both with same results.i need to know how to test these mafs to be sure they work.another problem im having is my scanner cannot communicate with the vehicle computer through the obdII port.the wiring was done by yuri as wiring specialties.another thing i noticed was my reverse lights do not work.im assuming they are supposed to work(sarcasm)there is a small plug over by my ecu that looks like it runs to the back of the vehicle,it is attached to the same spot as the secondary plug on the main ecu harness in the kick panel but nothing is plugged into it.well as you san read i have a few minor problems and one major problem sooo.any ideas?

[rogoman]

Before we can help you, state the year and model of your car!!!