magdalenaschulz5
Honda Greiz knocking combustion
Summary of the thread
A 2018 Honda Greiz with 173,893 km is experiencing knocking issues, reduced power, jerking during acceleration, and smoke. The suspected causes are combustion chamber deposits or a faulty knock sensor. After consulting with others, it was confirmed that substantial deposits in the combustion chamber were the issue, and cleaning was required to resolve the problem.
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4 comment(s)
magdalenaschulz5 (community.author)
I use premium fuel. I'm hesitant to use additives without knowing the cause. Which fuel additives did you use in your Astra, and did you see improvements?
KFischer88
I tried a couple of different fuel additives, but they didn't make a huge difference. The problem kept coming back. Eventually, a workshop confirmed it was carbon buildup. Get it checked by someone who knows what they're doing.
magdalenaschulz5 (community.author)
Following your recommendation, a mechanic confirmed substantial deposits in the combustion chamber. The repair, including cleaning, cost 425€. Thanks for your help.
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HONDA
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GREIZ
KFischer88
I had a similar issue with my old Opel Astra diesel: loss of power, jerking, even some smoke. Did you check the simple things first? Are you using good quality fuel? Have you tried fuel additives to clean the fuel system?