Fault Codes Causing Major Headache

[TinyTim]

I have an 07 plate 2.0tdci zetec galaxy which i have been really pleased with until last Oct when the engine seized. the engine has been rebuilt but when i picked it up fault codes appeared which seem to say that every component in the car is at fault. after two further weeks of trying to trace exactly what the problem was, it was then taken to a very well known ford garage in Maidstone where they firstly informed me that the car wiring loom was at fault then changed their mind and said just the engine wiring loom.I then got a second opinion from an auto electrical company in maidstone who said the code related to the Turbo actuator valve. It then went to a local garage who could not get the fault to appear even after several test runs. I picked the car up and considering its been off the road now 13 weeks you would think that its all sorted, but only after half an hour on the road the engine management light came on and went into its usual crawl mode, its done it several times today and i am now lost as to know what to do next - any ideas apart from the scrap yard that is