Black smoke and acceleration problems on Mini Paceman Diesel

Hello everyone, I own a 2010 Mini Paceman with a diesel engine and 132,000 km on the odometer. I've noticed that my car emits black smoke from the exhaust when accelerating, especially at low speeds. It also produces a 'machine gun' sound and sometimes accelerates suddenly. The orange engine light comes on from time to time. The first problems appeared last June. My mechanic checked the injectors without finding any problems and replaced the solenoid valve, but that didn't change anything. This winter, the problems subsided, but since February they have started again. My garage added a cleaning product to the diesel fuel and advised me to push the engine between 3000 and 4000 rpm. Even the Mini dealership doesn't know what to do. Would you have any advice or solutions to offer me? Thank you in advance for your help!

(Translated from French)

3 comment(s)

Check the air filter for any blockages or dirt, as a clogged air filter can cause black smoke and poor engine performance. If it's dirty, replace it and see if the issue improves. Let me know how it goes or if you have any further questions!

Hello, it wasn't a filter problem, we still haven't found the issue. The situation remains the same. As a reminder: Black smoke under acceleration, Jerking, loss of power, Abnormal noise, randomly illuminated engine light, intermittent failures, difficult to reproduce in the workshop. Injection rail pressure sensor and EGR valve changed, high-pressure sensor connector changed, EGR valve changed. The pre-purchase technical inspection indicated an error code P0087. Random failure already present on the invoices, fuel pressure sensor changed twice. Can you help us?

(Translated from French)

Quotation:
@DIDINE wrote on
Hello, it wasn't a filter problem, we still haven't found the issue. The situation remains the same. As a reminder: Black smoke under acceleration, Jerking, loss of power, Abnormal noise, randomly illuminated engine light, intermittent failures, difficult to reproduce in the workshop. Injection rail pressure sensor and EGR valve changed, high-pressure sensor connector changed, EGR valve changed. The pre-purchase technical inspection indicated an error code P0087. Random failure already present on the invoices, fuel pressure sensor changed twice. Can you help us?

Inspect the turbocharger for any signs of wear or damage, as issues with the turbo can cause black smoke and power loss. Check for any leaks in the intercooler or boost pipes, as these can also lead to similar symptoms. If you're unsure, it might be best to have a professional mechanic take a closer look. Let me know if this helps or if you have any further questions!

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