How Can Issues Arise with a Diesel Common Rail Injector System?

If you have a diesel-engined vehicle, the fuel must be delivered in a certain fashion to maintain performance and avoid any issues. In fact, diesel has to be pumped at a much higher rate when compared to a traditional petrol engine, as it also needs to act as a coolant to regulate some of the crucial component parts. So, how much pressure does this put on the individual fuel injectors and the system that controls fuel flow?