I also would like to mention that if the switch is on and the car not running, when I shove down on the air intake plate I can hear fuel being dumped into the engine. Is that a sign the plunger is working ?
The fact that you can "shove" (be gentle) the air metering plate down means by definition the plunger is working... if the plunger wasn't working (moving up and down) then you wouldn't be able to press the air metering plate down (unless the plunger is stuck in the full up position, but that would supply maximum fuel flow through the injectors and I would think you would notice that). However, that doesn't mean the barely visible fuel slots are open and free of gunk, ditto the fine mesh screens on each port or the ceramic valves or paper thin diaphragm.
The fuel is continually sprayed at the back of each intake valve via the fuel injectors. It is not likely that you are hearing the spray. You may be hearing the fuel circulating through the fuel distributor on it's way back to the tank but the spray should be far too subtle for you to hear. I suppose it's possible if you have very good hearing. I don't.
With the key on and the engine at idle, the air metering plate should be slightly open.... the thinness of a business card sounds about right (maybe a bit more). With the air metering plate fully closed there will be insufficient air entering the system to support combustion.
Have you by any chance checked the fuel pressure? If you haven't you might want to start there. You might also try running some Techron through the system to help clean it out. Once you get the engine running well enough to drive the car, it would be a good idea to add a bottle of Techron to you next few tank refills. More is not necessarily better... don't exceed the recommended amount.
Any chance you could post a video of the engine running? As it stands now we're painting with a very broad brush, we'd be in a better position to give advice if we could see and hear the engine running.