Hi
I don't know what research or knowledge you have regarding this, but there are a couple of test that should be performed prior to doing this one.
I have done most of them. I am a rookie in this game, but made it - I think.
You can read this thread to get an idea of how to go about it. Please read the threads by Thierry and Stup. They are way ahead of me.
CIS injector flow testing
Good luck.