How bad is it to replace the fuel pump? I am starting to get random PO300 codes as well, so last night I replaced the coil packs and cleaned the TB, idle air control valve, and EGR. I have yet to replace the intake tube, but now I'm thinking I should get me a fuel pump as well. It's definitely driving much smoother now, but after 1/2 an hour of driving I took off from a light and the car stuttered for a sec and then got going. I'll probably replace the fuel pressure regulator as well while I'm at it. Has anyone straight-piped the pre-cat and then pulled the first O2 sensor out of the exhaust stream a little to fool the computer? I did this on a turbo legacy and didn't throw any codes and passed DEQ this way.