Rough idle jeep 4.0

Things to check....spark plugs and wires, bad fuel....analyse the fuel in the tank for dirt water...replace the fuel filter evey 30,000 miles and do a fuel injection service every time you do the fuel filter.If you cant find the problem ofill your tank with high test and add fuel injector additive to the fuel at fill up use the black bottle of Chevron Fuel Injector Additve) works real good, if you dont fill the tank at least put in a bit more then 20.00 at the time you add the cleaner to the fuel.