I have an infinity Q45 1997 it will turn over but won't start. I replaced fuel pump and it still won't start

I got a flat was riding on it about a mile to pull into a parking lot. Heard noise that didn't sounds like flat tire. When I went to listen the car had already cut off. Fuel was low so I thought I was or of gas.put in more gas car just turns over. Replaced fuel pump and car still won't start. Help me