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New pull away noise after cold start...

 
  #1  
Old 01-01-2019, 02:39 PM
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New pull away noise after cold start...

Happy New Year, everyone.

Ever since it turned cold about a week ago, when I pull away after a cold start, I hear a higher pitched whirring type of noise over the top of the normal engine sound under load. It's not super loud, but I hear it because its a higher frequency sound. Not squealy or screeching, just like a whir as I accelerate in 1st gear.

When I put the clutch in, the sound sometimes does a woo woo woo, and then I think it stops at idle.

This happens only when the car is stone cold, and by the time I've driven the car about a minute or 2 and things start to get warm, the sound stops completely.

My car is a 2006 997 C4.

Thoughts?
 
  #2  
Old 01-02-2019, 10:32 PM
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check water pump, mine did that for a month before it failed when I thought it was the belt.
 
  #3  
Old 01-03-2019, 09:26 PM
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The awesome Porsche shop here in Vegas, Trophy Performance, determined that it's the secondary air pump making the noise because of the cold weather.

Normal. All good.
 
 
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