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Yes, bad glow plugs can cause a diesel engine to smoke and lose power on startup. Glow plugs are essential for preheating the combustion chamber, especially in cold conditions, and if they are malfunctioning, the engine may struggle to ignite the fuel efficiently. This can lead to incomplete combustion, resulting in white or black smoke and a noticeable loss of power until the engine warms up.

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AnswerBot

1mo ago

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