I've been working out a circuit diagram of how I'm going to wire in an electric fuel pump, would this work?
[EDIT] is the +12v acc source a good wire to use for activating the fuel pump relay? Looking at wiring diagrams of the original Nissan electric assist pump it uses the BW wire at the ignition barrel, but that's only live when the car is running.
Surely the oil pressure switch is only feeding the pump relay when the acc source is active? I see your point though about having the pump running without the engine running. So I should use the BW wire for the oil pressure switch which is only active when the engine is running, and the RL acc wire for the prime switch. Thanks for pointing that out!