Primastar Power Loss Jerking Acceleration

I'm having issues with my 2003 Nissan Primastar gasoline engine (247480 km). I've noticed a significant power loss, and the van jerks when I accelerate. There's also smoke coming out the back. I scanned it and found an error. Could this be knocking combustion? Maybe it's due to deposits in the combustion chamber?

4 comment(s)

Sounds like detonation. Are you using the right fuel grade?

I always use the recommended fuel, but could that still cause it? If it is detonation, what's the best way to tackle those combustion chamber deposits? Is it like trying to clean a burnt pan?

If the fuel is correct, it's probably something more serious causing pre-ignition. I'd get it checked by a workshop. Could be cylinder heads or even ignition timing.

Thanks for the advice! I took it to a workshop, and you were right, it was deposits causing knocking combustion. They did some engine tuning and cleaned everything up. Cost me about 425€, but it's running much better now!

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