I know this has been covered before but I can’t tell for sure if it’s the bypass valve or a vacuum leak because I’m building boost but mostly only at wot and I have a ac delete so it can’t be that but it has thrown the bypass sticking code before just not in the past month or two since I threw some white lithium grease on it the only thing that makes me think my valve is still messed up is sometimes the idle will get really choppy and rough

 

Could be that the diaphragm (rubber) in the bypass valve is torn, which could account for choppy behaviour. This is how it looks inside

 

Someone correct me if I'm wrong but I don't believe the BPV would cause a choppy/rough idle. Sounds more like a possible vacuum leak to me.

 

Could be many things

any dtc’s?

 

Following this thread. I too suspect I have a bypass valve issue as well, despite my having installed a new one in January when I replaced my supercharger. My symptoms are under partial throttle (normal acceleration), there is a very noticeable flat spot in power from about 3000 - 3500 RPM. If I got to WOT when I hit this flat spot, my car will respond with full power. This flat spot is REALLY irritating to me, it's like something is holding my car back.

I also get random, rough idling but that has existed for years and these forums indicate that is something with the electronic throttle, so I'm not very concerned about that.