on the 72 220 D custom turbodiesel 4 cyl, what would anyones opinion be as to why the injector pump only sends fuel to two lines out of 4? the car hasnt been run apparently in like 12 years. i wanted to ask before i start wasting more time with it. could it be dirty? or rebuilt? the older owner is a retired jet mechanic, so he wanted to rebuild it himself, and i said i dont know if that would be worthwhile or possible, or anything. anyways, what do u guys think?