High EGT, No Boost and a major boost leak!! PLEASE HELP.

[VNL670]

(10-08-2016 )Hammerhead Wrote:  

(10-08-2016 )gearhead Wrote:  I would unplug egr valve or block the intake would be a better way. I think that the egr is blowing open or something. This would be my first check for this problem for sure. Not leave it this way but for test purpose. The delta p could be reading wrong and causing the egr to do the wrong thing.

I agree with gearhead completely.
Logical testing order;
1 CAC
2 EGR circuit
3 air compressor
These are the most likely and easiest to test without the aforementioned plugs...
You seem to have eliminated #3. I say "seam to" because it wasn't tested "in situ", so you have eliminated the plumbing but not the compressor itself.
You're convinced it's not #1, but test it anyway.

You are correct on the air compressor part. We are going to retest all 3 once we get the proper tools to pressurize the whole engine as Rawze and the other members mentioned. We'll keep you guys updated.