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故障现象:发动机在正常运转中无异响,当急加速时,进排气歧管处发出有节奏的异响,像薄金属叶片振动时发出的声音,断火异响消失。
Symptom: The engine has no abnormal noise during normal operation. When it accelerates rapidly, rhythmic abnormal sound is emitted into the exhaust manifold. Sounds such as when the thin metal blade vibrates, and the abnormal sound of fire disappears.