I have a 1993 4.0 jeep wrangler. I put in a new fuel pump, The jeep still has a hard time starting and when it dose it stops running after 15 sec, I checked the fuel filter and it was ok?

Sounds like you should look into your fuel pressure regulator.
Amazon com Omix Ada 17711 01 Fuel Pressure Regulator Automotive

This system requires rpm signal before it will power up fuel pump .
THE PCM POWERS UP THE FUEL PUMP FOR TWO OR THREE SECONDS AT KEY ON !

replace the fuel pump,the check valve that holds pressure on the fuel is in the fuel pump.The fuel in the lines is draining back into the tank

well you have done everything i would have done ,except take a old plug and pull a lead off any cylinder then put the old plug onto the lead and crank engine to make sure you have a spark

when it does not start you need to verify no fuel pressure, Most likely your problem is the wiring harness is bad which will destroy a new pump if the pump is not geting the voltage required.

Ok...you mentioned that there is no spark coming from the coil when it's in no start...Is there power from the alternator going to the coil?
One other item...If the timing chain is worn and stretched, it is possible that the cam sensor and crank sensor are out of phase with each other, just enough where a temperature difference will change starting ability.
One question...while in no start, have you tried changing the throttle position while cranking to see if it lights at part or 3/4 throttle?

Hi Dava224 i had the same problem with my 1989 CJ. when it was cold out i would pump the gas pedal 3-4 times before turning the ignition. it puts a small amount of fuel in the motor without stalling it out. it wont start as hard. another good idea is to keep some fuel stabalizer in the tank everytime you fill up. hope this helps

check to see if their is any fuses blown or change out the fuel pump relay and also check to see if the ground to the fuel pump is getting a good connection these things should solve your problem.Good luck

pretty sure the injectors run of the ecu but woudnt swear to it cant u loosen a fuel line and see if pump is working

your fuel pump is bleeding off have it checked!