my post in the old thread was locked, so i made a new one:
i bought an e39 540 97- a couple months ago and its vibrating at 1300 and 2000. its always the same vibrating and in same RPM. i got a perfect Idle.
i changed my valve-gaskets and all the ignition coils at the right side because i could hear very small misfiring from that side but i cant hear them anymore after the change.
the car has always been like this since i bought it.
The reason that i write is because i found a user here with the same problem and he fixed it, but i don't know what or where the PCV and transfertubes is? a picture or some explaining on easy English would be nice, or maybe the parts are here: RealOEM.com BMW E39 540i Intake manifold system