ENGINE SOUND KEEPS GOING UP AND DOWN

  • Tiny
  • DZAM
  • 1994 Audi Quattro

ENGINE SOUND KEEPS GOING UP AND DOWN

Friday, February 22nd, 2013 AT 7:53 AM

2 Answers

  • Tiny
  • exovcds
  • Member

Check for stored fault codes (if ECM equipped) and vacuum leaks.

What engine?

Thomas

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Saturday, February 23rd, 2013 AT 12:55 AM
  • Tiny
  • mhpautos
  • Expert
  • 30,486 posts

Probably a faulty idle control system, check for codes and get IAC system checked out first.

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Wednesday, April 24th, 2013 AT 4:05 PM

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