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Hi guys, as per title, I've got a 57 plate Zafira Cdti 150 Elite, recently the Dpf blocked to the point where it split the hoses an would not run, I replaced that cleared the saturation and forced a regeneration to clear every thing.Now when the car is cold it's running really badly, almost on 3 cylinders, it's still smoking quite a bit of white smoke an its nipping the eyes if your stood at the back as it's obviously unburt fuel.When the cars warm it runs not bad, but does have a major flat spot at around 1500 revs.I've had it on the Bosch KTS machine an no fault codes what so ever, it's idling around 760 to 830 rpm an the crank is idling between 375 to 400.I've removed an cleaned the egr an replaced the air flow meter, it doesn't use any oil or water.Any help appreciatedDarren
 

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sounds a bit like an injector off, unburnt fuel stinging the eyes,
running rough,
have you cleaned out properly the egr valve and don't forget to clean the pressure boost switch on the back of inlet manifold.
 
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