Injector testing how?

[CTDiesel at aol.com]

I am wanting to check the spray patterns of my fuel injectors so I popped out
4 of the 5 (5th one is impossible to get to under the ISV) and lifted the air
plate but nothing sprayed out of them and there was pressure in the line.
Does the fuel pump have to be running the whole time when you lift the air
plate?  If so how do you jumper it without a "special tool"?

Thanks
DJ