The injector pump is controlled by a vaccum signal coming from a throttle plate in the intake, like the really early MB diesels. They have a wierd electric motor controlled rotary thingy that controlls glowplug switching, cold start advance, and engine shutdown. I know an old guy who installed on of these motors in a full size Dodge truck, drove it for a few years, then built his own steel and aluminum body and box on a 3/4 ton GMC frame, and put the Nissan engine and trans in it, coupled to a Ford transfer case permanently in low range. Top speed is only about 35mph, perfect for the dirt roads around here. Enough torque to pull huge logs out of the woods, which he freqently does. Oh, and he welded up the diff. so it will go anywhere without getting stuck.