right I have a 2004 cmax with the blown engine out on the deck and have bought a replacement I did have the mark 1 g8da engine but now have g8db engine did not relise till it was delivered .........do I need the ecu to get it to run or can I just keep my ecu and change all the aux parts over........ noticed there is a throttle body on it on the intake and also the pipes going onto the egr valve are different