check engine light

I have a 1990 Z, auto, non-turbo. Noticed my car hesitating/sputtering a bit and the check engine light came on. Looking for ideas of where to start checking or a list of systems/problems that the check engine light pertains to...any help appreciated.

SS

OK, found a list of codes for check engine light but now looking for instructions on how to find/check for the code that kicked mine off. Found 240zx instructions (pulling off ECU and turning a screw to count blinks) but can't find for 300zx.
Thanks

first you need to pull codes form the ecu which is located under the carpet in the passenger side where the feat are, to get a complete list of how to do it go here /http://zhome.com/ and search in the how to's section, it talks about hestiation and stumble problems there as well, this should tell you everything you need to know

thanks for the info!! I found everything I needed...now, fingers crossed on the problem!!

Thanks again!