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anna_neumann1

Vauxhall Adam knocking combustion

My 2018 Vauxhall Adam (gasoline engine) has a knocking sound under load, reduced power, jerking during acceleration, and smoke. A diagnostic scan showed an error. I suspect combustion chamber deposits. Any ideas before I take it to a mechanic?

Summary of the thread

A 2018 Vauxhall Adam exhibited a knocking sound under load, reduced power, jerking during acceleration, and smoke, with a diagnostic scan indicating an error. The suspected cause was excessive deposits in the combustion chamber. The solution involved a thorough cleaning and engine tuning adjustments, which resolved the issues, resulting in smooth operation.

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4 comment(s)

davidlorenz1

Sounds familiar. I had similar symptoms on my Adam. Does it feel like the engine's hesitating, like a runner hitting a wall?

anna_neumann1 (community.author)

Indeed, it does! The hesitation is precisely as you describe. Could you elaborate on your experience? Did the symptoms manifest similarly, and what diagnostic steps did you undertake to ascertain the underlying cause?

davidlorenz1

Yep, same symptoms. Best bet is to get it checked at the workshop. Sounds like what I had. They cleaned the engine and it's been fine since. Don't want to risk further damage.

anna_neumann1 (community.author)

The diagnosis confirmed excessive deposits within the combustion chamber. A thorough cleaning, coupled with adjustments to the engine tuning, fixed it. The total cost was 425€. The Adam now runs smoothly.

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VAUXHALL

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ADAM