On occasion, after driving the car for a good 30 mins. plus, this strange thing happens. The power steering goes out, the spedometer goes dead, the trip and milage meter stop turning, and the car suprts in surges when I take my foot off the accelerator after picking up some speed. I thought the problem was electrical, but my mechanic said something about the power steering and stuff being powered by some belt. I really didn't understand it. That is why I am turning to you guys for some insights. Please do not refer me to do a search, becuase this is way to broad to do a specific search. Any and all suggestions/ideas are greatly appreciated.

Thanks in adavance,
Steve