There were a batch of faulty rail sensors stock-purged around that year - I had the same symptom of cutting-out when flat-out on a couple of vans.
Broken wires inside the loom are very common. Bell the circuit through from the ECU, or measure the voltage on the three pins at idle.
[By pump pressure sensor, I take it you mean the £180 brass sensor in the fuel-rail?]
The sensor we changed was the pump one (Held on by three torx screws)
Have checked the wiring all seems fine and no added extras fitted to fuel system.
Is that brass rail sensor a more common faulty item?