故障现象一辆2006款东风爱丽舍16V轿车,行驶里程约为9万km。据驾驶人反应,该车高速行驶时突然出现较强的前后抖动,减速停车发现怠速时发动机转速会自动升高至4 000 r/min,同时排放的废气有非常浓烈的燃油味。故障诊断接车后试车,故障现象与驾驶人所述基本 Symptoms A 2006 Dongfeng Elysee 16V sedan, mileage of about 90,000 km. According to the driver’s reaction, the car suddenly showed strong front-to-back jerk when traveling at a high speed. When decelerating to a stop, the engine speed was automatically raised to 4,000 r / min at idle, and the exhaust gas emitted had a very strong fuel smell. Troubleshooting after the car to take the test, the phenomenon of failure and the basic driver