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一辆帕萨特B5轿车,装备ANQ发动机和手动变速器,累计行驶14万km,发动机出现冷机难起动,起动着机后加速无力,以及怠速抖动严重等故障。首先试车,验证故障现象。感觉发动机加速反应迟缓,排气管冒黑烟,怠速抖动严重,在车内觉得转向盘和变速杆都在抖动。初步断定有气缸工作不良,随后对各缸进行断火试验,除第3缸工
A Passat B5 sedan is equipped with an ANQ engine and a manual transmission. The total number of vehicles traveling is 140,000 km. It is difficult for the engine to start up when the engine is cold, acceleration is weak after starting the engine, and the idling jerkiness is serious. First test drive to verify the symptoms. Feel the slow acceleration of the engine, exhaust black smoke, severe idling jitter, steering wheel and shift lever in the car are shaking. Preliminary concluded that there are bad cylinder, and then off the fire test for each cylinder, in addition to the first three cylinder workers