Won't start? crank over and has spark but no ignition

What is your question?

Drove the car 50ish miles on saterday and now Monday will not start. I have pulled all the plugs checked gap and made sure they were all firing. The engine will crank but not start. Every now and again it will hit in one cylinger and give me hope but nothing yet. Any ideas? I am leaning toward fuel pump or a clogged fuel filter. but it was running fine when I came home