Diesel don’t have vacuum… I have a proper diesel manifold gauge and a pyrometer. I have the 2.0 diesel and at idle, I am reading 0 or in your case (14.7 aka atmosphere) and when I am at wot I can see 30-32 psi (it has a little tune in it). Factory it was only 20-22 psi.Looks nice. On the 1.6 diesel engine at idle is 15 psi. Pushing the pedal gets me 45 psi peaked. Big difference compared to the gasoline engine.