Problems With 94 Cherokee Sport

Hello, I am new the group, so any advice is very much appreciated!! I have a 1994 Jeep Cherokee Sport 4.0L with 150,000 miles on it, I am the second owner of the car and it runs great most of the time! Sometimes while driving the Jeep doing 1500RPM's-or somewhere around that amount, the engine with just basically kill out and drop down to nothing or die, and then I let off of the accelerator pedal and mash it again and it will sometimes re-fire. I have also noticed the Jeep dying at stop lights, sometimes when rolling up and sometimes when accelerating away. I thought I might have had dirty fuel injectors, so I used some fuel injector cleaner and that didn't help, so I assumed maybe I had some water or moisture in my gas so I bought a bottle of gas dryer to remove the water, the didn't work either, so I don't know what to do, and I was thinking about maybe taking it to a mechanic or the dealership that might could put it on a machine and watch it and see what might be causing it, but didn't know if there was such a machine to do that. The Jeep runs fine most of the time though, still very strong with 150,000 miles on it, but what fools me is that there isn't any check engine lights on at all. Go figure! As stated before any advice is appreciated.