Originally Posted by GoRomeo
I swapped/cleanned my vanos a few weeks ago along with an injector cleaner (Chevron) fill and my car's idle is very smooth now. Not sure if was due to the vanos swap or the injector cleaning...either way I am happy with results. Next is task is changing spark plugs.
I also had occasional limp mode on my 335i and it was faulty intake solenoid.I took it out n cleaned it and switched positions with the exhaust solenoid and limp mode was occurring more often than before cleaning like almost every wot.
bought new solenoid n never had a problem again.for some people the cleaning/swapping works but not for my car