故障现象一辆行驶里程约为11万km的宝马535车(发动机型号为N55),据车主反映,车辆在高速行驶过程中,有时突然失去动力,再踩下加速踏板,发动机加速无力,立即靠路边将发动机熄火,等待一段时间,一切又恢复正常。故障诊断接车后首先验证故障现象,接通点火开关,起动发动机,发动机顺利起动,仪表盘上没有故障灯点亮,且发动机怠速转速平稳;踩下加速踏板,发动机加速 Trouble phenomenon A mileage of about BMW car BMW 110 car (vehicle model N55) about 110,000 km, according to the owner reflects the vehicle at high speed during the process, and sometimes suddenly lost power, and then depress the accelerator pedal, the engine accelerates weakness, immediately by the Turn the engine off the roadside, wait for some time, everything is back to normal. Fault diagnosis After the first car to verify the fault phenomenon, turn on the ignition switch, start the engine, the engine started smoothly, no fault lights lit dashboard, and the engine idle speed steady; depress the accelerator pedal, the engine speed