Priming a good, functioning IP is pretty straight forward. Even though you don't own a Mity-Vac, most pumps will prime themselves... it just takes a bit more work. First, make sure your filter is full of fuel. You do this by drawing fuel from the filter outlet where it connects to the IP. Alternatively, you can pull the thermostatic-T on the top of the filter and fill it w/diesel or stanadyne, dieselkleen, etc. Once you know the filter is full (or as full as possible), then try and pull the fuel from the IP side of the thermostatic-T. This is the hard part w/o a Mity-VAC. You can unhook the hose, put it into a jar/jug and crank until you get fuel. It may take a while and depends on the pump integrity and how much air it has to dispell. Don't crank for long periods of time and let the starter cool every few minutes. Once you get fuel out the outlet side of the IP, re-hook your thermostatic-T up and then crack your injector nuts. I just loosen them a few threads and wrap them in a paper towel. This keeps the fuel from spraying all over the place yet lets you see pretty quickly when fuel is coming out. Thick, heavy rags can obscure the event and get messy as they absorb lots of fuel before it shows on the outer surface. Once you get fuel to the injectors, tighten everything up and it should fire off within a few seconds (rather roughly at first). Within another few seconds, the idle should smooth out and run pretty "normally". All of this has been explained above but... you're just fighting some air in the lines and getting things primed can be somewhat of a bear, sometimes. You should entertain the idea of picking up a Mity-Vac. They're cheap and indispensible for this and many other jobs...