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车型:配置5.0L发动机(508PN)。行驶里程:84549km。故障现象:用户反映做完保养后,第二天早晨发动机启动困难,加速不良。回到保养店中,维修人员检查发现,故障如用户所述。使用诊断仪进行检测,发现有故障码“燃油油轨/系统压力过低”。测量低压燃油压力为400k Pa,低于450k Pa的标准。给车辆低压直接接上吊瓶,调整压力在500k Pa,故障依旧。拔下高压燃油泵燃油计量阀的插头,着车后测
Model: 5.0L engine configuration (508PN). Mileage: 84549km. Symptoms: Users reflect the maintenance done, the next morning engine start difficult, poor acceleration. Back to the maintenance shop, maintenance personnel inspection found that the fault as described by the user. Using a diagnostic tester to detect and found a code “Fuel rail / system pressure is too low ”. Measure low pressure fuel pressure to 400k Pa, below 450k Pa standard. Low pressure to the vehicle directly connected to the bottle, adjust the pressure at 500k Pa, the fault still. Unplug the high-pressure fuel pump fuel metering valve plug, the car after the test