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Old 03-13-2011, 06:58 PM
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BigCo540i BigCo540i is offline
The Usual Suspect
Location: Richmond, VA
 
Join Date: Jul 2007
Posts: 2,713
Mein Auto: 98 E39 540i - 09 E90 328i
*UPDATE*

Ed you are correct that the two items are not related.

Good news- I replaced the thermostat earlier today and the code for faulty electric thermostat did not reappear. Took me about an hour and a half, I did not remove the aluminum throttle elbow but if you are going to do it this way you need a good swivel socket set. A hook tool is also handy for prying the lower hose off the tstat. I couldn't find mine so I used a small Allen wrench and vise grips to hook the hose and pull it loose.

Bad news - fluctuating idle still there. I'm going to replace the CCV next.
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