Mechanics

IT BEGINS TO OUTPUT BLUE - BLACK SMOKE

2003 Audi A4 • 4 cylinder Automatic • 100,000 miles

2003 Audi A4 4 cyl Automatic 100,000 miles. I have an Audi A4 1.8 Turbo. When it idles for about 3-5 minutes it begins to output blue - black smoke from the twin exhaust. Is this a problems caused by the turbo is not getting air through it when the vehicle is not moving? When driving it does not appears to be a great problem. Alternatively could it be a fuel issue or something more sinister - the rings perhaps?


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2CarPros-Archives
October 11, 2010.



This smoke will be oil smoke, I would do an oil consumption test first, change oil and filter make sure oil is exactly on full mark, note mileage and run for one week and check oil, if low add but measure amount used and note mileage. Report back findings, check sparks plug for contamination (oil fouling) is there any smoke (blue) when starting up cold? If not there may be an oil control issue happening, or a turbo oil seal. If a turbo seal is faulty you will see small specks of oil on the back of the car and the tail pipe will be greasy with a little oil as a turbo oil seal leak will not fully burn the oil entering the exhaust.

Tiny
2CarPros-Archives
Oct 11, 2010.