4.0l stumbling above 1700rpms
Alright fellow gear heads. Did a recent build on the 4.0l comp cam lifters, head work, msd ignition, Bosch 4hole injectors, and fresh ckps. Jeep is hard to start but idles fine until 1700 rpm then it starts to stumble. Timing is jumping all over the place when you put the light on it. We're stumped. All sensors have been checked and or changed. Timing is set properly as well....verified but multiple shops. Suggestions? New ECM as well.....well reman..