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故障现象:一辆东风EQ1090型汽车,发动机高、中、低速时消声器发出有节奏的“突突”声,且怠速稍高和慢加速时现象明显,拉阻风门无
Symptoms: a Dongfeng EQ1090 car, the engine muffler at high, medium and low speed rhythmic “bursts” sound, and the phenomenon of slightly higher idle speed and slow acceleration, pull the throttle without