fixing a vauxhall combo cutting out?

hi i have a vauxhall combo that i have changed the edu on for a second hand one , with the old one it stopped dead and needed a tow to a garage, have the second hand one fitted and it starts now but wont rev over 2000rpm or if i try to drive it cuts out straight away , do i need to code the second hand one to my car , if so can anyone help vehicle is a 03 vauxhall combo 1.7di y17dtl isuzu edu help need to get back to work in van

MICKY B
November 2010