Toyota Camry engine ignition failure

Toyota Camry engine ignition failure
Symptom: a Toyota Camry sedan engine has ignition signs, but not up and running.
Diagnosis: As the electric engine control system is relatively complex and relatively high reliability, we have the spirit of the principles of the easier issues first checks.
First, check whether the normal high-voltage arcing. Unplug the flash high-voltage single-cylinder test, found that spark intense, bright, that the ignition system to normal.
Then check the intake channel is open. Remove the air filter and found that more dust the top with a net after-loading high-pressure air blowing on, start the engine, the fault remains.
Then check the oil. Oil pressure gauge connected to the fuel pipe on the road, start the engine, measured the fuel pressure is only 10kMPa (normal is between 230 ~ 250kPa). Check the pipe does not leak the office, turn the ignition switch can hear the sound of electric fuel pump operation; so that may be due to blocked fuel filter or tubing, resulting in hydraulic systems can not be established. Then replace the fuel filter, clean lines and high pressure air blowing, but after loading start vain. Then oil is then measured 110kPa, concluded that electric fuel pump damage, the pressure can not be established. Remove the fuel pump from the fuel tank, fuel pump out the oil carefully observed cracks in the mouth, estimated fuel leaking from here, back to the tank, then determined by the test case, the replacement of a new fuel pump, troubleshooting.
Conclusion: EFI engine electronic control system works relatively high reliability, such as the computer running over 150,000 km in it may be faulty, so the experience-based EFI engine failure should do first check, the easier to find fault. According to experience, EFI engine failure occurred in the oil on the road, because the fuel injection system and high precision, high quality requirements for fuel, so the failure of most of the oil on the road with oil, such as the common fault "electric fuel pump supply shortage." and "bad injector fuel injection" are related to fuel quality related. Of course, this case is rather special, ask the driver to know by then, the chassis had been scratched stones, may run into fuel pump, causing damage, the long-running, gradually so severe that the engine can not start.