This has been a battle with my car since the beginning of time. It is a 2008 GTI (FSI). I am not very good at diagnosing issues with vehicles and also not very good at paying VW $120/hr to do it either. I have changed my upstream O2 sensor which is what the dealership told me my issue was, and I have sprayed the crap out of my engine bay looking for vacuum leaks and cleaned the MAF. I am not really sure what else to check and I would like to get it solved before she comes out of the garage for the summer. Any help would be appreciated thank you!