Pump is submersible and is 95' deep. 15 years old. Gould's pump. Tech inspected and did the following: bled air tank...set pressure to much higher than it was. Well pipe full of water. Said there is some 'grounding' on pump??? When all faucets are OFF...turning the cellar cold water on is is FULL pressure. Letting that run 1/2 power I turned the outside faucet and NOTHING.... I shut the cellar OFF and then put the outside faucet on and FULL power. I shut all faucets off and sink on 3rd level good...bathrooms on 4th level good. When cellar faucet on FULL 3rd level sink runs maybe 40%. I cannot figure it out as the pump fills the tank quickly and then goes back to 40 and comes on again. Also put a new pressure switch in which was clogged with debris. With the cellar faucet ON FULL power there is constant full pressure water coming out...same if all faucets OFF and just the outside faucet in ON...same if just one faucet is ON anywhere in house. Help!