Bought a new to me 3330 . When I put the aim in the automatic position the rate goes crazy. It goes up to 100 and then when I kick the booms on, it goes to 7. When I switch to manual, the rate stays steady and the pressure stays at 50 where I set it. This also has a raven injection system with a 1 way valve in front of the mixing chamber. This creates a boom pressure constant even when the pump is turned off. It has a pro 700 with a 372 receiver. Also this evening it lost communication with the receiver and the nav 2 and would not spray. Any and all help would be appreciated.