Symptom: a Toyota Camry sedan engine has signs of fire, but can not run up.
    Fault diagnosis: As the electronic control engine control system is more complex, and the reliability is relatively high, we in the first easy to follow the principle of inspection.
    First check the high-voltage line flash is normal. Unplug the single-cylinder high-voltage line for flashover test and found that the spark is strong, bright, proof of ignition is normal.
    And then check the intake channel is smooth. Remove the air filter, found above the dust is more, with high pressure air blowing after the installation, start the engine, the fault remains the same.
    Then check the oil path. The oil pressure gauge connected to the fuel line, start the engine, measured fuel pressure is only 10kMPa (normal 230 ~ 250kPa between). Check the pipeline is no leakage, open the ignition switch can hear the sound of electric petrol pump operation; so that may be due to gasoline filter or tubing blockage, resulting in the system can not afford to build oil. So replace the petrol filter, purge the pipe, and use high pressure air blowing, but still can not start after loading. Then measured oil pressure value of 110kPa, concluded that the electric fuel pump damage, can not afford to establish the pressure. Remove the fuel pump from the fuel tank, carefully observed that the fuel pump out of the mouth of the cracks, it is estimated that fuel leakage from here, and returned to the tank, the test fruit so hard to replace a new petrol pump, troubleshooting.
    Conclusion: EFI engine electronic control system reliability is relatively high, such as the computer running in the 150,000 km can be a fault, so encounter EFI engine failure should be done before the basic inspection, easy to find fault. According to experience, EFI engine failure occurred in the oil on the road, because the fuel injection system, high precision, high quality requirements of the fuel, so most of the oil on the road with the oil, such as common failure "electric fuel pump fuel shortage" And "injector bad fuel injection" are related to the quality of fuel. Of course, this case is rather special, and later asked the driver that this car chassis has been scratching the stone, may encounter fuel pump, causing damage, after long-term driving, gradually serious, so that the engine can not start.