Hi had a few issues with my avant 1.8t but thanks to you guys- Aaragon i have corrected most of them. My car has super chip, uprated recirculating bov, n75J, enclosed induction filter. It spikes at 1.25bar and drops back but holds steady 1bar of boost and feels pretty quick. However sometimes it seems to drop into limp mode where it won't boost past 0.5 which makes the car slow- this can happen at anytime and weather is not a factor. Also sometimes when it is boosting well it can be a bit 'juddery' on W.O.T, particularly when i up-shift, almost feels like it is hitting rev limiter which it isn't. No fault codes other than intermittent water temp sensor which i have ordered. I did have a idle problem where it was dropping down real low and bouncing but replaced the N80 and it seems fine now. Maybe i'm missing something simple but hope somebody can help me out again.