95 nissan sentra gxe cranks but don't start

Hello everybody, I’m having a heck of a time with this. I just replaced the timing chain in the above vehicle on advice from my mechanic. I’m 90% sure I’ve got it timed right. I’ve verified spark, ECM codes, fuses, the fuel injectors are clicking. The only thing I can’t verify currently is fuel pressure and compression. Still no start. Can anyone give me any guidance. Thanks.