2009 Astra 1.3 diesel. Drives needs some work

Please read before calling If you cannot understand the advert get someone to read it for you Phone coverage bad. If you dont get a ring tone text please. Please dont ring asking what's best price its 850 No offers these cars are 2 to 3k tested No best price no last price no cash price Dont ring asking what's wrong with it I've stated here what it's doing and what I think might be problem Theres nothing more I can tell other than what I've written here 2009 Astra 1.3 diesel 90 BHP 6 speed gearbox Clutch flywheel and gearbox perfect.. these alone secondhand are worth what I'm asking for the car. No nct Drives well very tight But a little smokey.. think it's a fuelling issue when you put foot down theres a little vibration shuddering. Still accelerates well but feels like its holding back. Smoke isnt oil its rich fuel mix you can smell the diesel from exhaust fumes tried few things like new egr but I'm not going to bother trying anything else. Car drives well as is. If you can live with bit of shuddering and bit of smoke.. New turbo fitted New egr valve fitted Good tyres rear almost new Has swan neck towbar fitted Could do with a clean inside and a polish outside