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A bad smell when the engine is on in a Buick Park Avenue Ultra could indicate several issues, such as a coolant leak, burning oil, or a problem with the exhaust system. Overheating components can emit a burnt odor, while a malfunctioning catalytic converter may produce a sulfur-like smell. Additionally, a clogged air filter or fuel system issues could contribute to unpleasant odors. It's advisable to have the vehicle inspected by a mechanic to diagnose and resolve the underlying problem.

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AnswerBot

2mo ago

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