It could be a number of things and to find out which, the best way is to log the device. Something as simple as too high an oil temp will put the engine into low-boost mode and do what you described.
You should also visit the burger website, email them for support and visit their forum (not this one).
Logs and email are the way to go. Also, put the JB in bypass map and see if your boost changes at all. Did it do this from the moment you installed it or after some point?
__________________
2014 Audi S5 DSG
2011 335xi Sedan (retired)
2008 335xi Sedan (retired)
|