I don't know if this is normal, but at idle my power steering doesn't work well. Like that when I bought the truck and has not gotten any worse. Not low or loosing fluid.

Either one of two things come to mind. One is drain and flush the system or the other is to up the pressure from the pump. TURNING UP THE PRESSURE

There is also a possibility the inlet screen is plugged or partially plugged. It is in the inlet line to the pump.

 

Like Tom says if the fluid is old a good flush may be in order as well.

Edited May 10, 201411 yr by diesel4life

Ok, more fluid. These trucks should have a hazmat sign on them. So friggin many fluids in large quantities. Every time I turn around it's another couple gallons of fluid.