Re: 2001 4.7l No Start Issues
The WJ is using PCI bus communication, its just a name for the way the data communication between the several components is done.
The WK uses a CAN bus system, which has a different communication protocol then the PCI data bus and when i´m not wrong uses 2 data buses and the PCI only one.
2005JGC can probably tell it better, but i´m afraid that this engine will not work in the WJ. Or you should change the PCM AND the tone rings inside the engine. This last one is not impossible, because the tone ring on the crankshaft is bolted on, but it will be quite a job. Maybe you could change the engine for a WJ 4.7 for not too much.