1992 Eclipse non Turbo cranks and has spark but won't start

I just bought a 1992 Eclipse non turbo it has spark but won't start some times. It has a new fuel pump and it starts some times but sometimes it won't. Any ideas? It has a new battery and cranks but some times it just won't start.

Any check engine lights? Sounds like a fuel problem. Since you just bought it you should do a full tune up (oil change, plugs, wires, fuel filter, timing belt etc.) and go from there.