Crankshaft position sensor
 

Just put fuel pump on 05 Cherokee 4.7 because of lack of pedal response and starting issues. It ran fine for 45 miles now want start people are telling me crankshaft position sensor trying to get some info from your guys it'll only turn over will not crank ANY INFO WILL BE GREATLY APPRECIATED NEED HELP ASAP ONLY VEHICLE

ok

I am not a mechianic but i was having issues. it would start and i could use ti all day then the next day would no longer start. would crank but not start.

i started with the crankshaft position sensor worked great for a day.

then replaced
ignition coil worked great for a day
replaced cam sensor (also called ignition coil pickup)
rotor
distributor cap
wires

since all that was replaced its worked fine for many weeks now without a problem.

First you should have a fuel pressure gauge to check the fuel pressure before deciding to change the pump. You hould have one now to rule out the pump. That said, starting issues are the hallmark of crank and cam sensor issues. These should throw codes but very often do not.
MOPAR only on these even if from the junkyard. Am running a jy cam sensor now, with no problems for 2 years, after going through 2 Dontalast sensors. That was the problem, funny power and hot no starts.