Jeep cranks fine, idles fine, runs fine until about 8-10 miles then it starts cutting out bad. Not cutting off, just cutting out. If you keep the rpm's above 2500 it runs like a champ but as soon as it gets under that it starts again. New plugs, wires, rotor button and cap. New crank position sensor, new intake air temp sensor, new fuel filter, new coil, throttle body cleaned, new air filter, any ideas????????????

 

Check engine light on?

Sounds like the O2 sensor might be done for. OE is NTK

 

This

When you first start up you jeep is running open loop.....it's not really looking at the 02 sensors to control your fuel trim. Once it warms up and goes into closed loop then it starts looking at sensor data. If they are giving bad data the jeep will run bad.

Again, do you have any codes?