hmm, are the injectors stuck open or something? Or possibly a knackered fuel pressure regulator? Try putting a pressure gauge on the end of the fuel rail when you are trying to start it to see what the fuel pressure is doing. Could also take out the fuel rail with injectors still connected, disconnect the cable from it (so the ecu doesn't fire the injectors) and prime the pump by turning the ignition on, see if any of the injectors are leaking.