I have been having some problems lately with my 93 fox body. It seems like the more and more I drive it throughout the day, the more and more it surges when I'm driving. I let it sit idle for about 10 minutes to warm up, and when I came back outside the car cut off. My Check oil light is on, but when I check the oil in the car, it still reads full. The oil pressure guage can read normal on one stretch of the road, and 2 minutes later read well below the "N" on the normal. How much do Oil pumps cost? How hard would the job be? Any comments or replies or greatly appreciated.