View Single Post
      04-16-2012, 06:30 AM   #4
mattsfeir
Lieutenant
United_States
37
Rep
458
Posts

Drives: 335xi
Join Date: Oct 2009
Location: CO

iTrader: (2)

Could be a vacuum line, but mine went slowly over time and ended up at really low boost, not sudden like yours.

Search for a thread started by me in the N54 section for how to diagnose and fix if needed.
Appreciate 0