Hi all broke down yet again going to work in my 406 HDI the most unreliable car i ever owned, anyway any suggestions to what might have caused this? It started knocking and blowing clouds of smoke out, engine management light came on, i had a quick check under bonnet to check wiring etc, try start a few mins later, it would tick over fine but as soon as i try reving it, clouds of smoke ( White) and engine knocking like too much fuel getting injected, some one said it's crank pos. Sensor knackered, I'm borrowing a scanner later to see what comes up, anyone else had similar problem? And suggestions appreciated, as I'm not paying Pug rip off labour rates ! lol Regards John