Replace Vanos Or Vanos Solenoid First

[naderh]

My 99 M3 after much help from the forum I finally come down to why I think my car has about a 25-35 horsepower loss. I think its down to either the replacing the vanos or just the vanos solenoid. At around 3,000 to 3400 rpm car makes a howling sound and a faint vanos sound (marbles in a can) but very very faint. I an not sure if its the vanos howling. (its not comiong from the cold airintake either. So do you think I should replace the whole vanos unit.

[bluemoon2222]

Replace the entire vanos with one from Dr. Vanos... check out www.drvanos.com

[DJ Genius]

Replace the entire vanos with one from Dr. Vanos... check out www.drvanos.com (http://www.drvanos.com)

+1 if you have money for it :) otherwise unplug solenoid and see if there is a difference. That's the way to determine if the solenoid isn't working properly.

[naderh]

DJ genius just unplug the wire that comes out of the back of the solenoid and then Ishould drive the car around the block and see if there is a diffrence. That won't hurt the car?

[BaltimoreBimmer]

No, it wont hurt the car. Might set off a MIL, thats about it.

[JuM3]

what are you suppose to unplug?

[Balthazarr]

what are you suppose to unplug?

See the wire coming off the solenoid?
Follow that to a connector and disconnect.