Re: 03 wj jeep hard to start
If you prime the fuel system 3 times, does that make any difference?( ignition switch OFF-RUN three times, and then start)
Did you change the fuel filter/regulator for this problem, or did the problem start after changing the filter?
Did you check for eventual fault codes set in the PCM? A faulty coolant temp sensor will cause hard starting. If you have a scanner with live data, you can check the different sensors and see if their output is in reasonable limits.
Could eventually be a leaking injector.