Hi Paul,
You can check if it is an injector fault by disconnecting the leak-off pipe from the back of the cylinder head + observing the amount of fuel coming out on idle or cranking. It should be virtually nil. A steady flow indicates 1 or more injectors faulty. Indentifying the individual injector requires EXTREME care as you will need to break open high pressure fuel lines. Do the test 1st + see how you get on.
Astramax151
March 2009