vendredi 2 mai 2014

A4 dry black soot exhaust gas

Hi all,



Can anyone can help on this one?



My 2009 A4, 2.0T blows out a puff of dry black smoke on morning start ups, and thereafter ONLY when I change down a gear...or accelerate hard on the higher gears.



There's no oil - just dry black soot/smoke, and usually just a puff.



There is no powder visibly blowing when the car is driving at a consistent speed on any gear.



1. Mileage is 167000km

2. Oil consumption is aprox 500ml every 300-400 km's





Any advice please?




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