Odd Fuel Issue (with PIC)

A couple days ago I started my 1994 Ranger and heard a low, and not very loud sound, much like a "fuel injection prefire". The truck started and ran fine, so I didn't think much of it.

Well I started smelling gas.

I pulled over after a few miles and gas was coming out of the fixed metal tube at the base of my injection manifold area (see the yellow indicators in the pics). The thud had popped the connecting tube (red arrows) off. So I reconnected it and the fuel mixture seemed too rich and would not run. Knowing it had run for several miles fine, I disconnected it and capped the end with the spring encapsulated tube. I have to reinforce the tube because the pressure is way too high when the engine is off. It will balloon the vinyl tube and pop it if I don't.

The truck is running run great without it connected to the fuel return tube. As you can see, I have capped the fuel pump return receiver tube end with cloth to avoid any foreign material getting sucked into the fuel pump return tube.
My question is: Am I doing any damage by allowing the injection "area" stay at such a high pressure while the truck sits?

http://img.photobucket.com/albums/v606/Cyberdactyl/NON%20BZ/fuel.jpg

There must some logical reason why certain components were installed in the vehicle. You are dealing with a dangerous situation (likelyhood of fuel leaking and ignited by hot engine) I'm not sure what the devices were although it looks like it,s a pressure sensor of sorts but I'm not sure. If I were you I'd take it to a good mechanic and check it out.

Yes, I plan to have it repaired as soon as possible.

I wanted the truck to be mobile for one or two days. I am just worried I could do damage driving a few miles.

It was a bad fuel pressure regulator for anyone having this issue in the future.