he taught me a couple of tests....how to test bowl,pressure switch.theres an adjustment on the pressure switch to make the brakes hold more psi...good for racing....look at top of switch you will see a dab of rtv...pull it out and theres a jewlers flat head screew inside....you can safly turn it one turn clockwise to increase the pressure cut on/off.....
theres a valve and spring inside master cyl from pump motor.....pull it out ande clean the surface area where the two half meet.this will make the system hold pressure....a couple of things i remember off the top of my head.