99 Acura cl 2.3 automatic, turning over and not starting, then working fine later

Just as the title says I have a 99 Acura cl 2.3 automatic. The car will turn over but won't start. That happened a few times in the beginning of the day after working fine the day before. Then the next day it started fine and ran fine for 6 days before doing the same thing.

It turned over and wouldn't start on day 7, then it started that afternoon and has run fine for the past 2 days. The starter and battery and alternator are all recently replaced and working well. What could it be and what do I do to fix this problem. I took tomorrow off work so I can get this done.

I'm thinking it might be spark plugs or ignition coils? But there's been no misfire, or any other symptoms. Please help