Hello...RR experts I need some help. I have 12 evoque that my wife loves and I dispise. I had the the 2 codes arise and found the dreaded manifold crack, I got that repaired and codes still appear. I have fixed the crack, replaced both O2 sensors 2x new RR mas air flow sensor and still has the the stumble and pops through the breather box on occasion. I'm thinking un metered air is entered into the system from somewhere. Any thoughts before I talk myself into trading it in?