Fuel pump questions

[bruce plecan]

The return line must have a min of pressure.
All gas tanks have a line at the bottom of the tank, for the pick-up,
and then various others, they can be mounted all over the place.  
I beleive it was some Chry. where they had some mounted on the sides at
about what would be 7/8 full.  On some tanks there is a large trapped
air bubble, all I was making the point was not to let the return line be
covered, if the return is sometimes covered the return line pressure
goes up, the regulator can't bleed the pressure down, and the motor goes
very rich.
  Hope that better explains it   Bruce  nacelp at bright.net