95 250 176k miles sputtered and stalled on me like it was running out of fuel. Got it apart today and found there was air in the system so I drained it, got it to run and idle then stalled again. Not sure why there would be air in it in the first place. Checked all lines w/ no leaks or kinks. Please help this is my first diesel and I am lost. What are possible reasons it would be starving fuel? Thanks.

 

Some more info might be helpful. Anything you have done to the truck lately? Air in what system? What did you drain?