H-town 94 Cherokee shut off after idling for about 30 min
 

So recently I was having overheating problems with my 1994 jeep Cherokee sport, so I fixed the issue. My problem is that I left the truck in idle for about 30 minutes to test if it would overheat or not. and then it shut off. I was sitting in the driver seat and the heat gage only read 210 degrees. So it is not a heat issue that caused it to shut off. Waited about 10 minutes then tried to start it and it turned back on, Followed by it turning off again, and now it does not want to start. I already changed the ignition coil and hear the fuel pump when I turn the key. Does anyone have any suggestions on what it might be?? Any idea helps