Sorry Bidja i do remember reading that yesterday now, I've just been reading a lot of threads over the last few days. Why i was asking about the egr is that I've read that it opens up while cruising and boost pressure drops. I have not blocked mine yet. Do you think this could be a factor as to why I'm not getting 10 psi at 100km/hr in 5th gear. Because i did get 10 psi at some points on flat road but it would drop down to about 7-8 psi