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Vacuum help

  #1  
Old 06-12-2015, 04:58 PM
1st Gear
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Join Date: Jun 2015
Posts: 2
Default Vacuum help

I have a 2004 A4 Quattro 1.8T with a very small vacuum leak. I have tried the engine starter spray trick but I had no luck. I think this leak is very small which is probably why. My check engine light stays on too.

I've been told that these vehicles have a secondary air system. Which I have no idea what that means. Can someone please help me?
 
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