Alright I have searched but couldn't get it to refine down enough an got a couple hundred threads so I'll try an make it easier

98 sport 4.0 auto
Started long starting occasionally a couple weeks ago an now it's constant. If it's been sitting awhile an cooled down it will not start first crank. Doesn't matter if u hold it 2 secs or 10. Tried to let it sit an on an have the fuel pump prime an it makes no difference. Once it warms up it will crank right up every time. If it's only been sitting for 10-15 mins it will start on the first try just takes 3-5 secs. I installed a new bumper about 3 weeks ago an had to take the vacuum ball out. I just capped the vacuum line off. Could this have anything to do with it. Other than that plugs an wires are good. Battery terminals are tight an corrosion free. No CEL. Let me know what y'all think please. It's just annoying right now but I don't want it to get worse since it seems progressive. Thanks in advance

 

Put the EGG back into the system. The Jeep needs its EGG to produce the proper amount of vacuum. Test the CPS and CkPS, one of the position sensors may be failing. Test fuel pressure, just because you can hear the pump doesn't mean it's pumping enough fuel. Check for air leaks in the intake and exhaust. Clean the throttle body and sensors.

 

Could be a marginal battery too, worth getting it load tested.

 

Woops..