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Update on ACC Sensor and a New Question

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Old Jun 2, 2011 | 05:22 AM
  #1  
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Default Update on ACC Sensor and a New Question

Hi folks,

A quick update on the "ACC sensor blocked" problem that I posted a couple of months ago. I finally took the 2008 A8L to a dealer. They claimed that the ACC sensor was damaged due to some impact from the front. Therefore, it is not covered under warranty and it will cost $3,800 to fix it. I walked away.

Here is a new question. When I stop the engine, there is this loud "engine like" sound lingering for 1 to 2 full seconds "after" I kill the engine. This only happens about 1/3 of the time and is driving me crazy. Any wisdom/thoughts from you will be greatly appreciated.

Thanks again,
old man tom
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Old Jun 2, 2011 | 07:35 AM
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You have to love the Germans and their perverse service part pricing scheme. It's like they don't want you to repair the vehicle.

As for the noise, as a minimum we'd like to hear it or you'll have to trace it to a particular assembly such as the AC Compressor etc.

Maybe take a video with sound and post it to Youtube.
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Old Jun 2, 2011 | 08:13 AM
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It's Robin Hood's eval twin. He takes from the poor (ones that own this vehicles after warranty) and gives to the rich (ones under warranty).

As far as noise, open the hood and watch the engine having somebody else to stop it. You may be able to find the gremlin yourself.
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Old Jun 2, 2011 | 11:53 AM
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That "engine" noise is most likely the electric cooling fan. It may stay on for a second or two after you turn off the engine in very hot weather and it's pretty loud.
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Old Jun 4, 2011 | 12:49 AM
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LOL no wonder ppl choose to dump their cars and get another brand...you can get a used sensor on ebay for 100-300 bucks and if you don't wanna replace it yourself an indy will do it for you in ~1h...
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Old Jun 13, 2011 | 05:02 AM
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Hi,

Thanks for offering your thoughts and suggestions.

After carefully monitoring this "loud noise" during the past few days (some hot days and some cool days), I have concluded that it is the fan. It is surprising that it is so loud and lasts quite a few seconds after stopping the engine.

Thank you all again.

old man tom
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