Apoligies, i thought the CPS signal told the ECU to prime the pump? Thanks for noticing that! (p.s Tabetha "knows his shit" so listenen to him) Getting confused by all the cars i've seen that don't work properly! Mates 4x4 had no spark (fixed the other day), my white one (still fucked), and this one.
Anyway, defo check the relays work and if the pump kicks in at all when you turn the key, also correct me if I'm wrong Tabetha, But i think the buzzing he's reffered to in the first post is the brakes/ABS pump pressuing up when you turn the ignition on, all cossies do that.