not clued up on iveco models ,but if a 7.5 tonner ,have you put the injectors in correctly ???..with the 3 old injectors you put back in you did put in the tube that is matched to that injector ??as you can't mix the tubes up as they won't seal to another injector..did you install the injector first before fitting the tubes and you torqued the tubes ,as again if not torqued fuel will bypass in to the return line
norb
August 2012