These may help.
Sounds like a fuel pump / regulator / sensor issue. You could try these forums yourself
http://ivecoforums.com/topic/8868209/1/
http://www.bba-reman.com/forums/Topic106941.aspx
http://www.indeed.com/forum/job/diesel-mechanic/iveco-engine-identification/t32325/p13
Gladys
January 2015