1999 Audi A4 Do not idle

1999 AUDI A4
344,000 MILES • 4 CYL • 2WD • MANUAL
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PIET SMIT
  • MEMBER
  • 1 POST
My Audi idles unevenly and sometimes dies.I had it on a computer test and it shows that the master airflow does not work and a small breather pipe was broken, it was all replaced but it's still does the same.The fuell consuption is very high and black smoke comes out of the exhaust pipe.I had it at several mechanics and they can,t find the fault,can you please help.
Feb 19, 2010 at 12:39 AM
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LEGITIMATE007
  • ✓Experienced Mechanic
  • 5,121 POSTS
because of the black smoke, that indicates a rich mixture, too much fuel, so I would first check for vacuum leaks and a faulty pressure regulator(fuel). and bad injectors, checking the spark plugs wouldnt hurt either, is there a check engine light on?
Feb 19, 2010 at 12:44 AM
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