So this weekend i was wheeling at Tellico OHV and my power steering went out. It has done this before, but it always comes back. This time it did not come back. Every time it has happened it has been after I rev the engine to high RPMs. I think it may be a stuck valve or something in the pump. Does anyone have any ideas on what it could be. I do not want to start throwing parts at it. What does everyone recommend I do?