Does anyone out there know the proper procedure to test if the VANOS system is switching to the different cam at 4000 RPM's?? Thanks
2001 330i, BLK/BLK 5SPD, PP,SP,HK,Xenon, ESS Euro v110, PSS9, UUC Sways, Brembo CD, SS Lines, Hawk HPS, M3 Wheel, VDO Gauges, Dynojet Widebandcommander, Pioneer XM, Alpine CHA-S634
I think you should begin by understanding how VANOS works, there's no "different" cam in your car, just two cams.
http://www.bmwworld.com/technology/vanos.htm
But I bet your wondering why theres a hiccup on Dynos at 4000 rpm, hmm?
Because a car has a torque curve.
Vanos works continuously.
Anyway, if the car feels dead, then vanos aint working. The setting can stop on a variety of modes, so leave it further open or shut.
Does it not feel as quick as before?
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