Hello so I recently bought a 1997 f350 4x4 crew cab. It came with a miss/stumble at more than 1500RPM. The people that I bought it from had it sitting for a while. When they started using it again it ran fine for a while but then the fuel pump started leaking and it would not start. So they took it to a mechanic and had him replace the fuel pump he said it also needed a new injector on the 3rd cylinder. After they replaced those parts it had the stumble above 1500 RPM. I am going to get a compression gauge and check the compression and the fuel pressure at the fuel pump. Any other ideas of things to check are appreciated.