hello I have this volvo year 99 1.9 d with control unit msa 15.5,this machine ? in the recovery, and does not exceed 3000 rpm in diagnosis appears only the error control unit(problem cks) then I found a unit that is equal with the same numbers I put the old eprom on the machine ? the game, but has the same problem,
the cecksum pu? create these problems?in theory it should start up