Sooo my 2T motor finally died and have upgraded to the 2Tgeu motor, its so close to being done we just can't figure out the last bit. (i'm not 100% sure of the problem so I apologize if this falls into the wrong category) Have followed this diagram http://khi-santh.canberracelica.org/files/2tgeu.pdf . At the moment it turns over and will only start for a few seconds (every so often) before shutting off again , suspecting its something to do with the fuel injection?? Anyone have any advice on where to even start?

Have you checked you have power at the injectors? Sounds like it is possibly starting on the cold start injector then stalling. If not, check your injector wiring and relays