Hi Guys

Wondering if you could help me. My 1.6 tdci focus has recently started producing black smoke from the exhaust.

When removing the engine cover the first thing I noticed was the breather hose was disconnected from the engine, the clamp has broken off.

I have taped this back on temporarily until I can get a new clip / hose.

However, the engine seems to judder when the turbo kicks in. Could this be down to the engine having to adjust to the new level of air intake?

Would the disconnected breather hose be responsible for a build up of carbon, causing the black smoke originally?

Any help would be appreciated