I have 96 jeep cher. sport that won't start either

This thing cranks but will not start. Went to dealer shop for cat converter recall and the jeep hasn't started since. They said there work had nothing to do with it and pushed it outside. I trailered it home no spark at coil. Tested first then started replacing! Replaced coil, cap, rotor, crank sensor, ecu. fuses, relays. Nothing works. Help please!!