一辆奔驰MB100乘用车,在我厂做完维护,竣工出厂约半小时后,驾驶员又将该车开回修理厂,反映该车经过维护后,出现加速不畅,甚至熄火和怠速不稳的现象。试车发现,该车确有驾驶员所反映的故障现象,而且故障灯亮,在加速时,排气管有“放炮”声,进气管有回火。经询问驾驶员得知, A Mercedes-Benz MB100 passenger car, finished maintenance in our factory, about half an hour after the completion of the factory, the driver put the car back to repair shop, reflecting the car after maintenance, poor acceleration, or even turn off and idle speed is not Steady phenomenon. Test found that the car does have the driver reflected the phenomenon of failure, and the fault light, in the acceleration, the exhaust pipe “blasting” sound, the trachea tempering. After asking the driver that,