S4 (B8 Platform) Discussion Discussion forum for the B8 Audi S4 produced from 2009-2016

What is this sound??

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Old 11-03-2013, 08:15 AM
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Default What is this sound??

Not sure if you can make it out, but around at the 7-8 second mark after the car cranks and turns on, there's a sound that has just been happening like 2 weeks ago. Don't really know how to use words to describe it... kind of sounds like a high pitch buzz for a quick half second.

I'm at the 3.5k mile mark. Don't plan to bring in the car for the 5k service until around Xmas time. Should I get it checked out? Or is that normal?

I can try to upload another video if the sound quality is horrendous

Old 11-03-2013, 09:44 AM
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Your video is marked private. We can't watch it.
Old 11-03-2013, 10:48 AM
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Originally Posted by Bobby Kinstle
Your video is marked private. We can't watch it.
My mistake. Should be fixed now
Old 11-03-2013, 12:33 PM
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I'm not sure I hear it, but it could be the secondary air injection pump. Does it do it when the engine is warm?
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