Engine starts and quits

A week ago the car quit after driving about 1/2 mile. Power seat and windows would not work. Mechanic found a short in wiring harness under drivers side kick plate. Drove car home - no trouble. Car sat for the remainder of week. Today daughter took car. Drove about.10 mile and it sputtered and reved sporatically so she parked it. I started to bring home and it did the same thing, stalling several times. I got it to run wihile still sounding like it was missing a bit. Idled to near operating temp and reved a few times then it quit and would not start. Thinking it was perhaps a coil breaking down when warm I let it sit for a couple of hours to cool. Still will not start. I do not think the second prob is related to the first but thought I should mention it. Coil pack, control module? Don't know where to start. Thank you