Quote Originally Posted by axl100 View Post
I have 2012 Patrol and the other day i blocked the egr. Checked it with my scan gauge 2 throw a code and deleted it but it keeps coming up as pending codes p0401. Also notice my boost has reached 18.5 psi. When driving it the boost varies from 9 psi upwards and that with the cruise control on.
You could try and drill a 8 to 10mm hole in the blocking plate to eliminate or at least reduce the errors. Seems the GU8's tend to boost a lot higher from what I've been reading but I'm going to install a dawes valve on mine just to be sure and limit the boost around 16psi. I'm getting cruising boost of 22psi when cruising with no load at around 100ks...There was a good thread on here somwhere how the boost spike works when cruising