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Peugeot 307 losing power - what's the cause?

My 2005 Peugeot 307 1.6 HDI has started losing power. It starts fine, motors well too but blows grey/black smoke when increasing speed from 30-40 mph. At this point the engine feels sluggish too. Any ideas?

Asked on 27 May 2014 by uechisim

Answered by Honest John
Probably failed turbo bearing oil seals.
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