1996 Ford Crown Victoria sometimes wont start

This car has 4.6l v8. the car can sit overnight and the next morning it will not start. The engine will turn over and over and over. No fuel smells. Go back a few hours later car will start just fine and will for days. Then it will do it again. Doesnt matter if it just rained or if weather hot or cold. I replaced fuel filter with no luck. It does not throw any codes. Where do I Go from here.