Get a wiring diagram out.......

The Fuel pump power supplies some of the sensors such as ign amp and ICSV to name but a few, plus the injectors........

If you can get hold of a wiring diagram try tracing the circuit, plus have a look in the Tech essays section, there might be some documentation that'll help.......

Dont forget to double check fuses, i kow its a simple thing but sometimes a blown fuse doesn't look obvious.........

let us know how you get on.