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Unburnt fuel in the combustion chamber can result from several factors, including improper air-fuel mixture, inadequate ignition timing, or inefficient combustion due to low temperatures. Additionally, issues such as clogged fuel injectors, malfunctioning spark plugs, or poor engine compression can prevent complete combustion. These factors can lead to fuel pooling or incomplete burning, resulting in unburnt fuel being expelled from the combustion chamber.

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1w ago

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