about 2-3 weeks ago had a post about a running problem was told it was PTU got a new ptu still does the same thing, starts up and instantly dies.
also possible CAS playing up? Perhaps try and find a forum member nearby to drive over and swap some parts with to test things out? Bit of a long shot, but is fuel pressure staying up?
Fuel pump control unit - located under the trim below the little window on passenger side. Easy to bypass, check out the tech section.