I have a 2007 cmax and I had a injector leaking so had someone I know have a look and he said one of the injectors arnt to the car and one is bigger then the others and he showed me and that's why it was leaking so he put it back and took a while to start but he got it started.

When I went to get my boy it started and drove down the road to the roundabout and when I put my foot down on the roundabout white smoke come from front back and inside and the car studded and engine light came on so I stopped and had to cycle to get my boy I was only 2 mins from my house a clue of hours later when it cooled i got it back to my house but started to smoke again now looking at the turbo looks like oil over the pipe between the dpf and turbo any ideas its congilled oil thank you.

You will be better off posting this in the general forum it will get more views and I'm sure someone will be able answer, it would help if you said what the engine is