Sucking on the wrong tube, perhaps? It should work, if you know where to suck.
Here's an easy priming method that doesn't require sucking:
After you've filled the filter up with fresh fuel or additive, loosen two of the injector pipe fittings at the injectors. Just a couple of turns. Don't disconnect them entirely. The idea is to create a big, fat LEAK.
Crank the engine while a helper watches the "leaky" connections. Tell them to signal you the instant they notice fuel spraying from the fittings. (Yes, it'll make a bit of a mess...but nothing a few paper towels can't fix.) If the engine starts to fire, shut off the key immediately!
Once you've got fuel to the injectors, tighten the fittings and crank some more. The engine should start within a few seconds and run rather roughly on those two cylinders. After a few more seconds, it should smooth out as the other injectors come on line.
Come to think of it, you could probably bleed all 4 lines this way. It depends on how big a mess you want to make.
It works for me! Works like a charm, in fact. Even if you do the "vacuum method", the pipes will still be empty. (If you removed them.) It'll take considerable cranking. My method gets fuel to the injectors with a minimum of cranking.
-mickey
