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      11-28-2011, 09:15 PM   #7
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RupertPupkin's Avatar

Drives: Freak Beast
Join Date: Aug 2011
Location: East

iTrader: (5)

Originally Posted by Dr Zoidberg View Post
The dealer called, the car is done,

a brief summary , I will know more once I speak with the mechanic ,

they found several codes pointing to a stuck-open thermostat- it was replaced under CPO

They found several codes pointing to a vanos issue.
The screeching noise they said came from the vanos motor. ( what!! )
after troubleshooting the issue by swapping out the vanos motor and sensors, they found a faulty eccentric shaft sensor. and that was causing both the noise and the idle/drivability issues

A couple concerns

I dont understand how this sensor failure could cause the VANOS motor to squel/screech like that, but I do understand now why it was not happening under throttle.

I also dont understand that if the motor was screeching that bad , how nothing in the motor was not damaged. As I am guessing the eccentric shaft sensor was telling the motor to go beyond its limits?? no idea ?

Any help with this would be great.
I assume you mean done as in fixed? Not like dead? hope it worked out.