Nemo engine knocking

I also have a Nemo, and your symptoms sound eerily familiar to a problem I encountered some time ago. Reduced power, jerking, smoke – it's like deja vu! Have you considered looking into carbon deposits in the combustion chamber? It can cause knocking combustion, similar to a hammer banging inside the engine. What fuel octane are you using?

Thanks for the quick response! Carbon deposits... that sounds serious. I've always just used regular unleaded gasoline. Could that be the culprit? If it is carbon deposits, is there anything I can do myself, or is it strictly a workshop job?

Using regular unleaded could contribute, as it might not be burning as cleanly as higher octane fuel. However, if the deposits are already there, switching fuel probably won’t solve it. You could try a fuel additive designed to clean the fuel system, but honestly, given the symptoms and error code, a workshop visit is advisable. They have tools to properly diagnose and clean the combustion chamber. My Nemo had to have the cylinder heads checked; the final bill came to around 425€. Think of it like a blocked artery needing a proper check-up; better safe than sorry, right?

Okay, I understand. I appreciate the analogy and the advice. It does sound like a job for the professionals. I'll book it into the workshop and mention the possibility of carbon deposits in the combustion chamber. Thank you for your help!