Greg is correct, Diesels are compression ignition engines. Glow plugs heat the incoming air or the cylinder depending on whether the engine has pre-combustion chambers or not.
If it starts and runs and then dies, pull the fuel filter to see if it is full. Sometimes they will pull the fuel until it forms a vacuum due to fuel tank breathers being plugged, clogged or restricted. If that is not the case, check the cam sensor with an ohm meter. The problem will be that it will probably check okay cold and fail when hot. There is also a history of the high pressure oil pump failing, this is the one that runs the unit type fuel injectors, and is often called the upper oil pump. Remember to stick to the basics in your diagnosis. Check the fuel return line for bubbles, if that is the case, you are sucking air somewhere, the fuel water separator was usually the culprit. It has been awhile since I worked on these so don't crucify me if what I said is not applicable to your model year.
Scott