Thanks for replies!
Unfortunatly at the moment we dont have a scope, a bit of advice on the best value unit would be welcome, but at the moment I have to try and sort this car, Carl mentioned codeing these injectors, I was aware that this should be done but wasnt sure that it would make the car completely missfire.
This car did previously have one injector fitted some time ago with no problems, we didnt code that one!
As for tests already carried out we used a prologic probe and got a hertz reading from faulty injector harness with engine running, this was virtually the same as injector with functioning cylinder.
Solus does not have recodeing facility, (thought I'd bought the best!)
Thanks for the help, all the best, Fill.