<human>: Can you condense the text into three sentences or less?

Hey guys. I created this account because I'm strapped for cash and was hoping to get some help with my car as I'm not that knowledgable on the such things. I own a '93 Chevy Lumina I'm pretty sure its a 2.2L and it is 4 cylinder. Auto Transmission. My problem started two days ago. My car would seem to putt, for lack of a better word, while it was idling and giving it gas seemed to create less of an output than usual. Second day I am driving my car and stop at a red light and my car putts, stops putting and shuts itself off. I put the car in park give it a little juice as I turn the key and its back on and and seems fine until I let it idle or stop giving it gas for too long, in which case it shuts itself off. I've been discussing it with friends, coworkers and people at advanced auto parts. I think it may be either A. My fuel filter (I guess my car is so old there is no fuel injector) B. My fuel pump or C. Maybe O^2 or CO^2 sensors (my friend said something about this though the guy at advanced auto parts said that it wouldn't make my car turn off) I googled how to change a fuel filter on my car and it seems in my realm of experience. Any ideas? Alternative answers? Also... if you live around Milwaukee, WI area would you happen to know a decent mechanic or auto body place that is to be trusted? Thanks so much anyone and everyone.
<bot>: My car putts, has trouble gaining speed above 40-50 mph and turns itself off if left to idle too long without pressing the gas pedal. Any explanations?