Hello folks, I have a 1991 Jeep XJ Laredo and I've only been working on the suspension and drivetrain with recently replacing the radiator to prevent overheating in the Dunes.
After yesterday having some fun I stopped to let it rest on a scenic dune and after restarting the Jeep was having some rough idling. After giving it a bit of gas it seemed like the problem disappeared.

I don't know if this is also related but earlier; before I left that day, after starting her up it sounded like the fan was hitting something or if you've heard an old bug start up that's kind of what it sounded like. After restarting it the noise disappeared I checked the engine bay and there were no apparent problems.

 

sounds like the typical heat soak issue, mines done the same. search heat soak , tons of info here.