uphill ?
got a gas can handy?
why not disconnect the pump from the pickup, and run a short hose into a gascan, to see if the pump is willing to draw out of that?
infact, disconnect the outlet of the pump and run a hose back into the gascan, to rule out the pump
once we know the pump works, pick one of the lines to hook it up again and see if it works now
eliminate one part of the path at once
