That's running quite rich. Any fault codes stored in ECU? My guess would be there is an air leak in exhaust system not far from lambdas letting fresh air in, lambdas read it as lean and ECU then chucks in too much fuel.
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Currently 8less
2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D
8 history:
2006 A8 Sport 4.2TDI quattro SOLD,
1997 S8, reached end of life with gearbox failure
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