few questions about rover l series engine

as above,will parts from a same year 200 sdi rover fit freelander ie fuel injector pump? i know the turbo is in different position and its essentially the same engine,im thinking in geting a 2.0 xedi as a project to replace my knackered td4 commercial and turn it into a van for work,it has an electrical fault the guy says some times it starts and runs all day others it wont start,had a look it turns over no bother and a couple of times it nearly started after about 10 to 15 seconds ofturning but wouldnt start,no white smoke coming from exhaust so presuming it aint geting fuel fro some reason ,he says several local garages have looked at it and cant fix it so hes given up,any ideas,im no to familiar with the rover engine