I have a 92 hyundia Scoupe. The engine will run fine, start okay, ideal okay then will start missing running rough smooth out for a short while but continue to get worse till with a full peddle bearly make idel. The first time this occured I thought I had some bad fuel or injector problems. I filled the tank and added some STP fuel treatment and after a day or so it went away. Now about a month later it has come back. The real buggy thing is after the car sits for a few hours it is fine. I'm not over heating. It goes in spurts it will run fine for 60 miles ( usually the most I drive at a time) but the next trip even a ten minute one it will be back. Any ideas. Could it be electrical. The cars been starting fine but alternator light has come on a few time though not during these problems?