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故障现象一辆2009款捷达伙伴GiF手动挡轿车,行驶里程约为2.4万km。据驾驶人反映,该车热车行驶一切正常,但冷车急加速时会发闯,特别是在1挡升2挡或2挡升3挡时急加速,发闯感很明显,若此时缓慢加速,则无发闯感。故障诊断接车后,首先将车停放至冷车状态,然后陪同驾驶人一起路试。经路试,发现故障现象确实如驾驶人所述,同时故障发生时发动机前后窜动明显,并伴有加速不畅的感觉。分析故障现象,推断可能的故障原因有:火花塞突然失火或点火正时突然失准;喷油器突然停止喷油或喷油量变
Symptom A 2009 Jetta partner GiF manual transmission with a mileage of about 24,000 km. According to the driver reflects the hot car driving the car all normal, but the cold car will accelerate rush when accelerating, especially in the 1 block up 2 block or 2 block 3 block when the rapid acceleration, made sense is obvious, if this time Slow acceleration, then no sense of success. Troubleshooting After receiving the car, first park the car to a cold state and then accompany the driver to try the road. After the road test, found that the fault phenomenon is indeed as described by the driver, while the failure occurred before and after the engine ran well, and accompanied by poor feeling of acceleration. Analysis of the phenomenon of failure, infer the probable cause of the malfunction are: a sudden fire spark plug or ignition timing suddenly inaccurate; injector suddenly stop fuel injection or fuel quantity change