PowerSteering Woes

Jim,
Yes I have the fluid set correctly. I rechecked it yesterday after checking the hoses. It was nearly empty, it checked correctly cold and after warmed up. I don't have any history with this car before I tore it down 18 mos. ago. But the PS was doing just fine. Since then I have added a rebuilt NAPA Box, and modded the pressure relief to 850 psi and a new low pressure return line. The pump starts making some strange screeching after a few minutes on the road and some decnt acceleration. Not the same noise as when it is low of fluid. I guess a rebuilt pump is in order and go from there.

Thanks,
Marion