I can't figure out what is wrong with my pump. In the morning when i go out and drive the car the steering is sorta smooth but after about 2 minutes of driving the steering is stiff and its like not having any power steering at all. Now i have flushed the system out several times and nothing. The pully turns very nicely but its like the fluid isn't flowing. Could i have a clog somewhere in my line? Bad pump? What's the deal