What could be the reason for a 2.8T diesel engine frequently stalling?

Could the idle speed be too low?

Diesel engines don't have spark plugs, so if they stall easily, it's usually due to a fuel supply issue. I suggest checking the fuel pressure and using a diagnostic tool to measure the data flow.

If the engine frequently stalls, there are two possible reasons: one is the air supply system, and the other is the fuel supply system. It's best to use a professional diagnostic computer to check if there are any abnormal data flows.