Thanks for the response. This is my concern: the engine appears to be drawing fuel from the line that it should be returning fuel to the tank with.

As a dramatic demonstration of this: If I take a pair of vice grips and crimp off the fuel line just after the clear fuel filter, I can start the car and run it no problem while the fuel line is crimped!

I am assuming that the fuel is coming up the line that usually returns fuel to the tank. How is this possible? What part is broken to cause this? Is the lift pump right after the clear filter shot? and then the Injection pump is somehow drawing fuel from the fuel return?