http://www.motorsport-developments.co.uk/stus.html

You want to be reading Bosch fuel injection 1 2 and 3 and the read common rs turbo faults.... After this you will then be a pub expert and be able to tell people how and why they have fucked up their rs turbo !!! Lol......

On a serious note these articles are very helpful and should help you...... Good luck!!