friedhelmsilber29

Skoda Fabia Engine Knocking Sound

I am writing to inquire about a problem I am experiencing with my 2009 Skoda Fabia with a gasoline engine. The vehicle has approximately 183593 km on the odometer. I have observed a noticeable knocking sound that seems to originate from the engine, particularly under acceleration. This is accompanied by a reduction in engine power, noticeable jerking, and the emission of smoke during acceleration. Furthermore, an error code related to pre-ignition has been stored in the error memory. Based on my research, I suspect that deposits in the combustion chamber are the likely cause. I am seeking advice on potential diagnostic steps or solutions to address this issue. Any insights regarding ignition timing or engine tuning adjustments would be greatly appreciated.

4 comment(s)

Knocking combustion in the Fabia can be a tricky issue. I had a similar problem with mine a while back. Have you checked the cylinder heads for any signs of damage or excessive carbon buildup? What about the condition of your spark plugs?

I haven't checked the cylinder heads myself, but I did replace the spark plugs recently, and it didn't solve the problem. Could deposits in the combustion chamber really cause that much trouble, including the smoke and jerking?

Yes, carbon deposits can definitely cause those symptoms. The deposits increase the compression ratio, leading to pre-ignition and engine knock. The smoke is likely due to incomplete combustion. I would recommend having a professional inspect the cylinder heads and clean the combustion chamber. It's better to address it before it causes further damage to the engine. Trying to fix it yourself without proper tools and knowledge might be risky.

Thank you for the advice. I took the car to a workshop, and they confirmed the combustion chamber deposits. They cleaned it, checked the ignition timing, and the engine is running smoothly again. The final bill was 425€, but it was worth it to get rid of that awful engine knock.

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