If your injectors have 240,000 miles on them they're probably over due change. If nothing else, the O-rings are probably shot.
OEM injector part number is 4854181. This part number was introduced in 1999, and went through 2001. It is also used in other 4.0 liter Jeep engines beyond 2001. Ebay has rebuilt ones listed.
Just some FYI:
I installed FiveO Bosch/Ford XFE-C4B injectors a year, or so, ago with a rail from a 2000 XJ. Recently I've been experiencing an uneven idle, with an intermittant miss when at cold idle, but smoothes out when the engine is up to temp [no CEL]. I checked my fuel pressure at my rail at idle and saw the fuel pressure fluxuating rapidly between 30 and 50 psi. I pulled the XFE injectors and rail out and reinstalled my 4854181 injectors with my original '99 rail. The fuel pressure is now rock steady at idle but I still have the uneven/intermittant miss at idle. I'm going to reinstall the XFE injectors using the '99 rail and see what happens.
(All new plugs, wires, cap, rotor and fairly new coil. Compression checked within specs.)