Diagnoisticscscscscscscs

Hey, I've looked around and for a broke joke liek me its hard finding something in my price range. So i wanted to know if anybody could help me out with finding a cheap diagnostic tool that reads codes, not sure of the technical name i just call it (that tool that reads codes and shit), well anybody have any sites or anything that could help me find a cheap one, because i get a check engine light about every 5 miles.
Thanks

I think its called EEC. here's a web site that can explain it further

http://www.dalidesign.com/hbook/eectest.html

Pick one up from your local part store for less than $40. Assuming your bird is a '93 or older.

Pick up a Haynes manual and an analog multitester. Follow the instructions in the book. Or you could go to Auto Zone and they check it for free.