1994 Audi Quattro Engine Sound Keeps Down

1994 AUDI QUATTRO
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DZAM
  • MEMBER
  • 1 POST
ENGINE SOUND KEEPS GOING UP AND DOWN
Feb 21, 2013 at 11:53 PM
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EXOVCDS
  • ✓Experienced Mechanic
  • 1,882 POSTS
Check for stored fault codes (if ECM equipped) and vacuum leaks.

What engine?

Thomas
Feb 22, 2013 at 4:55 PM
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MHPAUTOS
  • ✓Experienced Mechanic
  • 31,937 POSTS
Probably a faulty idle control system, check for codes and get IAC system checked out first.
Apr 24, 2013 at 9:05 AM
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