If you have let the pump run long enough to get all the air out of the lines, it is likely there is an air leak at the input to the pump. Let the pump run for at least a minute, maybe two, until the faucet stops spitting air. With no air in the system, the pump should shut off in a few seconds, less than 5. If you can't get any improvement, check the connections at the input to the pump. There is a strainer at the input to the pump. It may not be tightly connected to the pump, the strainer may be cracked, or the line coming into the strainer may be loose. The pump is often under the hanging locker, accessible by lifting a panel in the floor of the locker.
"You cannot reason someone out of a position they have not been reasoned into"
Al, K5TAN and Missy, N4RGO
2002 Classic 30 Slideout
2001 Safari 25 RB Twin (Gone, but not forgotten)
2013 Dodge 2500 Laramie 4x4 Megacab Cummins
WBCCI 1322, TAC FL-39, AIR 82265