Connect the fault diagnosis device to detect the engine control system, the device prompts "the first three cylinder fire failure, incidental". Observe the engine idling run smoothly, read the data block 01-08-015, the data block shows no fire, fuel pressure, fuel injection time, intake air and oxygen sensor adjustment and other data blocks are normal.
     Clear the fault code after the test found that when the speed of more than 60km / h, the vehicle occasionally minor mistakes. Back check, the device still prompts the same fault code.