Recently removed and deleted EGR with blanking plates and having pluged the vacuum hose that's goes from EGR round the back of bulk head to a sensor/valve sort of thing, does anyone know if this should be left open or pluged or do I need to have a remap added to the car car feels down on power and just now right wondering if this is possible casue also tips to gain more power out the engine is more than welcomed (still learning the ropes of the vag diesel life)