My Jeep stopped whle driving and will not start up. It sometime want to but will not, the battery and alternator is good. just got new starter. any sugestion?

 

First I would get it scanned for codes. See what comes from that, if nothing comes up on a code reader check for spark. If it has no spark then there are more steps to take there. Also, check for fuel pressure, check to se if the fuel pump is working, etc.