故障现象一辆购于2010年8月,行驶里程约为9万km的江铃新世代V348全顺车,车主反映,该车最近发动机声音特别大,且排气管冒黑烟、加速不良。故障诊断江铃新世代V348全顺车为江铃公司引进福特技术生产的,发动机为2.4L DuratorqTDCi(Puma)的高压共轨柴油发动机,采用二进二排四气门、顶置式双凸轮轴、可变截面涡轮增压器(VGT)、电装共轨控制系统、手动式6速变速器(MT-82)等先进技术。接车后首先确认故障现象。接通点火开关,仪表盘显示正常,燃油量还有1/2左右,发动机故障灯正常点亮后熄灭;起动 Trouble phenomenon A purchased in August 2010, mileage of about 90,000 km JMC V348 Transit car, the owner said the car recently engine noise particularly large, and the exhaust pipe black smoke, poor acceleration. Fault diagnosis Jiangling new generation V348 Transit introduced to Ford for the JMC technology, the engine is a 2.4L DuratorqTDCi (Puma) high-pressure common rail diesel engine, using two two row four valve, overhead double camshaft, variable section turbine Supercharger (VGT), Denso common rail control system, manual 6-speed transmission (MT-82) and other advanced technologies. After the first confirmation of the fault phenomenon. Turn on the ignition switch, the dashboard shows normal, there are about 1/2 of the fuel, the engine fault light turns on normally off; start