My car won't start, I think it's a fuel problem. I would appreciate any help.?

So here is the deal. I have a 92 Chrysler New yorker Fifth Avenue, With a 3.8 Multi-port fuel injection. Up til yesterday it was running fine, but last night when I went to start the car it would not start. It will turn over and I can get it to run using starting fluid. I decided it was fuel problem so i started with the usual problem. I started with the fuel filter, and still no change. I then pulled the fuel lines from the engine and I am getting fuel from both the supply and return line. I can also hear the fuel pump running after turning on the key as well as while I'm starting the car. My fuel pump has been really loud for a very long time. Now for how the car acts while I try to start it. When i turn the key it turns over and I can tell it's trying to start. Some of the time while turning the engine over and pressing the fuel peddle about half way down it will start and rev up then idle down and die. If i pump the fuel peddle really fast I can get the car to run for about two minutes or so. As soon as i stop pumping and try letting off or staying steady on the peddle it just idles down and dies. I also disconnected the fuel lines for the engine and the filter and used a compressor to blow out the line. I then used the compressor to blow out the line that leads to the in-tank fuel pump. I only used about 15psi in attempt to not damage the fuel pump. My thought was maybe some debris was blocking the screen on the fuel pump, it had no effect. I'm really out of ideas and I'm looking for some suggestions and what to check or what could be wrong. I really only have one thought left about what could be wrong. I'm thinking the fuel pump is weak and unable to pump a sufficient amount of fuel into the engine. I don't feel like this is the reason because I've always thought pumps don't weaken when they are about to stop the just simply stop working. Oh one more thing, One the fuel rail there is a valve like that of the A/C pipes or a larger version of a tire valve stem. I unscrewed the cap and use a point to press the valve in, and fuel did spill out. This also leads me to believe that it may not be a fuel problem but something else. Please help!