If a electromagnetic pulse valve is always magnetized, it must be checked if the corresponding electronic switch tube is in electric leakage or broken-down.

若某一电磁脉冲阀常吸，应检查对应的电子开关管是否漏电、击穿。

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Check for signs of leakage or cracked surfaces at both ends of tube, exhaust manifold and EGR valve.

检查两个管的末端，排气歧管和EGR阀是否有泄露或表面有裂痕。

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