I know exactly what you are talking about, my 97 2.5 does the same thing. I am pretty sure it is due to my fuel pressure regulator/filter needing to be changed. Tell me, does it take longer to start after it has been sitting? My theory is that when the fuel drains back into the tank since the valve is not holding pressure, some air gets into the fuel line. When it starts, after about a minute or less of running fine, that 'air bubble' reaches the fuel rail and causes a slight stumbling for a few seconds. I usually can just 'rev through it' now that I expect it. I have the part, just gotta drop the tank and change it. One thing you can do to check if that's the problem is before you start your JEEP, turn the key to the on position without starting the engine, wait a few seconds, then repeat that twice, then start it. If it starts a lot quicker, that's probably your problem.