i know the above problems aren't exactly rare for a diesel (ok they leave the factory like that), but Bonny has started doing both excessively since the weekend. Had a car full & when you put the engine under load she gave a high-pitch screech, i assumed it was the DMF starting to give way but my old man thought of an air leak (which could explain the noise, air under pressure whistling). Now with an empty car the noise has died off but you can feel her hesitating now & quite a bit of black smoke when you feel her backing off, which does point to an air leak to me

so the question, i haven't had a look under the bonnet yet but are there any pipes that are prone to leaking, or is it the intercooler finally gave in?

many thanks Duane