I'm thinking that maybe i have a vac leak somewhere, hence why even after blanking the egr off its still lumby at idle 🙁 but want to know what's the best way to check them? Would it be worth my while just to replace the lot and if so does anyone know what sizes i need?
As an after thought, could either one of the cats be causing it?
Thanks again, as i know I'm a pain but i haven't a clue lol