:banghead: 1993 Chevy Cavalier Z24 - We know the fuel pressure regulator valve is bad. He can't find anyone to replace it for him and can't afford a true mechanic. How difficult is it to replace?

fairly easy to do. If you have basic mechanical ability, you can do it yourself. Get a haynes or chiltons manual, and the instructions are pretty easy to follow. The procedure is too involved to describe here, but I believe you can do it in less than a couple of hours. Being experienced, I could do one in less than 45 min.