Update: There are apparently two places where
the fuel pump sucks in fuel (in the gas tank). One of the lines came off
on the new fuel pump, here is a picture of the new pump and the two green
arrows indicate the line and the nipple it should be attached to:
http://www.nofadz.com/~sonic/pump1.jpg
Here is how it is supposed to look (old fuel pump):
http://www.nofadz.com/~sonic/pump2.jpg
We have no idea how the hell this happened, but now I am searching for a
way to permanently attach the line so it won't come loose again. I know
that there are certain epoxies that are resistant to gasoline, so we might
try that. This is what caused the low fuel pressure. I
cannot believe that a brand new pump fell apart like this.