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A weak 4D56 turbo engine with black smoke typically indicates incomplete combustion, often due to issues like a clogged air filter, faulty injectors, or a malfunctioning turbocharger. The black smoke is a sign of excessive fuel being burned, which can result from poor air supply or improper fuel delivery. Additionally, a dirty or failing intercooler may reduce efficiency, leading to a loss of power. Regular maintenance and inspection of these components are essential to resolve the issue.

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2mo ago

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