Starting and idling problems

Good thought's and input lads. I was thinking along the same lines of re-trying the 6.1 injectors, and if it runs on that then it's got me buggered as to why the 5.7 ones wouldn't be working. It is a 6.1 fuel rail, wouldn't have thought that would be an issue though. If no luck, i'll report back with what I find out. It will probably have to wait till the weekend till I can get back to the car.