You need a scanner to check the data/reading on it
Watch air flow and Baro readings.
First step is clean it with quick dry electrical cleaner and then clean it again for good measure. And then if it does not work right replace it.
Here is a repair info link.
http://www.alldata.com/products/diy/index.html
What engine and trans and Mileage?
Why are you asking about it? What is the problem? Any check engine lights?
What is it doing or not doing?
K @ N filter on it?
MT