i changed donor dme , changed isn , programing donor dme and coding it , 
after that i found fault in dme  valvetronic and injectors  short circuit to ground 
i dont know why 
i checked in programing there is no fault like  not compatible 
and its coding  correctly 
i checked by test plan  for voltage ,ground and  plugs , wiring 
and there all ok 
did any one meet that before 
f30 320 n20 
thanks