2001 Focus ZX3 - Replacing Fuel Pump & Driver Module

[larrydoood]

My first issue was the usual one-engine loosing power, shaking, flat spot when accelerating. I replaced the fuel filter, fuel delivery module (FDM) and PVC valve. This didn't fix the problem.

I parked the car and let it sit for several months, and now the engine starts, but immediately dies. The fuel pump primes when the key is turned on, but it's like it quits running when the key is in the "run" position.

I don't know if it is the fuel pump driver, it's circuit, the PCM or what

UPDATE:

I charged the battery, and now the car stays running, but of course, it still runs like it did before. The "check engine" light is on, so I'll just hook up a scan tool and read the codes. I know it needs O2 sensors already.