Water pump/no pressure?

Thanks all--problem solved. Tried hooking up to city water and letting pump run--no effect. Pump would begin to make a "throaty" sound like it was picking up water then continue to run without building pressure and shutting off. Although I had plenty of water in the tank, I filled it completely, turned on the pump, let the taps run for a few minutes, shut the taps and viola'--problem solved. Pump picked up the prime, built pressure and shut off like it is supposed to. Thanks all for your input.

chast wrote:
He) and the pump sounds normal (pumping water) but then goes quiet and keeps running.

Not sure I understand this part..

can you hook it up to a water connection and let the water run to help get the air out?

In the meantime waiting for an expert to respond try opening all of the faucets full blast for 15 seconds to see if that clears the air in the lines.