I have a 1983 280zx non turbo. It has an in line fuel pump. Two days ago, I started the car, and it went out (the fuel pump). As I was driving down the road, the car started sputtering, and it would die if I gave it gas. Eventually it stopped running. When I would try to start it, there was no noise coming from the fuel pump, and the car would idle really low (4 or 500 rpm) for a few seconds, then die. I replaced the fuel pump. I can hear the fuel pump now, and when I started the car it ran great for a few minutes, then I turned it off. I replaced the fuel filter, and I started the car again. First it started idleing low again, and now it wont start at all. What should I do?