My sister's Civic is not starting. I was driving it for a while, and it seemed like the fuel pump wasn't working. It would randomly sputter a bit, then continue running fine. Now it will not start.

If the CEL comes on for 2 seconds and then goes out, when the ignition switch is turned to ON (Position II), then focus on the distributor. Usually, replacing the Ignition Control Module (ICM) and coil solves the problem:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-4.html#post265896

It's running now. I replaced the distributor cap, for kicks, and decided to fight with it for a while. I knew I was getting some gas, the fuel pump was loud enough to give me that, but the engine would sputter for a bit and die out when I turned her over.

Thanks.