Just got back from dropping son 2 at cubs in the 850Tdi CD Auto.
The turbo actuator vacuum pipes have just been replaced this morning, yet did not activate the turbo. I had replaced a couple around a month ago and found the others to be like chewing gum, so replaced the others this morning. However, the turbo boost did not return. Until this evening when I couldn't believe to power. It was like never before. I was delighted.
Then, without warning there was a 'puff' sound, then the exhaust note changed to a deep burble and clouds of black smoke. Fine when driven carefully, but terrible when under moderate acceleration.
Now Lambda light on. No obvious fluid leaks, smells under the bonnet. Acceleration fine. But, there is no way that will pass its MOT next week.
Any ideas very welcome.
Here is a clip my [YOUTUBE]
https://youtu.be/NySzi9KVKqs[/YOUTUBE]