I tried to start the car up again and it would start?

A couple weeks ago the fuel pump on my car broke but I got around to fix this past Saturday. After I put in the fuel pump I put in clean gas and started the car up with no problem. The following day I tried to start the car up again and it would start. After letting sit for a few hours I tried starting it again this time it started after a few cranks but immediately turned off. I tried turning it on again a few hours later and it did the same thing. I changed the spark plugs and the fuel filter a couple months ago. What else should I check. Thank you in advance.