You are fine. You are using the same resistance, which is what is important. If it was a higher voltage/amperage system then it would require a larger Watt resistor, but since these are electronic components you can get away with low watt (read: cheaper) resistors. The code that gets thrown might cause the ECU to go into a "limp mode" where the map is tweaked for less power. If you are following a tutorial, I would follow it to the T without knowing the system well. What were the last things you changed since the fuel pump stopped working. And stupid question, but is it wired up (you said you were doing a lot of re-work, sometimes things slip by when putting it back together)