95 Ram 5.9L starting problems

I have a 95 Ram with a 5.9L Turbo Diesel. When it is cold, it seems to start and run fine. After warming up, I can get it started if I pump the gas pedal. Once satrted, it runs rough and then eventually dies. If I prime the fuel pump, it seems to start and continue to run with no problem. I just replaced the fuel pump thinking that was the problem to no avail. I have read a couple of things but can't seem to pinpoint anything. Please give me some suggestions if you can. Thanks.

might check out dtwtrucks.com there is a diesel specific forum over there, and I'm sure that those guys could help you out.

check your fuel lines and check valve. sometimes you can put air pressure to your fuel tank and find it. It sound like your fuel is draining back into your tank or leaving dark spots where you park at.