Yes. You will hook the ground of the meter to the battery, probe the positive at the injector and measure the cranking voltage. The reason you want that high voltage is that the injectors actually produce the high fuel pressure, not the pump. The pump just keeps then supplied, unlike a automotive system where the pump provides the pressure. If the running pressure is low, it will create a lean condition.
The big problem with the 1100Di's is that the cooling for the emm gets restricted by corrosion and overheats the emm frying it. If it runs, the first thing you need to do, if it hasn't already been done, is the cooling mod, and pull the cooling cover off the stator cover and clean it.