[olddog]

I think it was said that the fuel line comes out the top of the tank. Also that when the fuel line was disconnected from the pump that the line emptied and that was all that came out.

If the front wheels were on a ramp or car jacked up then maybe the fuel pump and fuel in the tank were at the same level, however if the fuel pump is lower than the fuel in the tank it should siphon (gravity feed) regardless of how high the high spot is in the line. If by chance there was a loose connection or pin hole to allow air into the line near the high spot, it would loose its prime and the siphon would stop. You may want to add a length of line to get it to the floor and see if you can siphon gas out of the tank. If you cannot then that may be the problem.