So I tried settling by the pressure with one line off running into a bucket. Couldn't get it to reach 3 psi.

Reconnected the line and it went to 9 psi and once it got there, I could hear the pump load up- meaning the motor plugged and slowed a bit when the floats shut off.

Can't drive it right now as the snow n salt and pretty gnarly.

I'm going to swap the bg 280 for an aeromotive 1000 and run -10 lines to the pump and try again