Sounds like Matt mixed up the black/blue and black/red, or you did or your car is backwards, who knows.

I know these two wires are fine MAtt because when he jumpers the relay out with a jumper wire to power up the pump, the car will run fine.

the white/red is the problem, 5v really isnt possible unless the wire is shorted. Can you locate that wire at the ECU plug? Test for ground signal there.

If the wire tests fine at the ECU then you have a bad wire. If your not getting any ground signal at the ECU plug then there is a problem in the ECU.

Terry