Model: 97 US regulatory Honda Accord, F22B4VTEC engine, mileage of 156,000 km.
    Symptom: the car nearly 10 days occasionally start the phenomenon of the car, the recent more frequent! After receiving the car to listen to the driver's description, said the car is like a dirty tank, fuel pump dirty dirty caused by the filter, or due to fuel pump heat caused by the recession. Because he had encountered several similar failures before.
    Maintenance process:
    From the description of the phenomenon, the possibility of dirty dirty pump filter also exists, but only as a reference. Start the engine smooth fire; and so on 4 to 5 minutes after the flame, and then start the engine only start the sound, but the engine can not catch fire; restart and some signs of non- With the driver's words to describe it as if the oil is insufficient. Through the initial diagnosis, the cause of the failure should be in the oil!
    To determine the direction of the oil, the first analysis is due to start when the lack of oil, so first check the pump whether there is 2 seconds of oil supply time, a person in the open ignition switch does not start the case, another person to open Tank fuel tank cover and found that the pump sometimes 2 seconds of oil supply, sometimes not.
    From the inspection of the situation, the analysis of ideas is correct, the next step is to determine the fault part of where Open the trunk interior, down the back seat, find the fuel pump and fuel level sensor height of the connector, with a test light test to find the fuel line of the fuel pump, and then test the lamp reliable ground to test the fuel pump 2 seconds Whether the oil supply function is normal. After repeated tests found that when the moment to open the ignition switch, sometimes 2 seconds drive voltage, sometimes not, although there are 2 seconds drive voltage, the engine can be a smooth fire, but the light bulb has a significant sustained flashing phenomenon! From the results of this inspection analysis: PGM-F1 main relay to the fuel pump supply voltage instability, come to this conclusion, and then in the driver's side of the dashboard to find PGM-F1 main relay, through the connection relationship And the line color on the main relay side to find the fuel line of the fire (black / yellow) line.
    Can be repeated by turning on the ignition switch to check and measure at the pump, the result is the same, so the results will be clear, that the stability of the main relay work down.
    Replacement of a new relay, repeated commissioning, troubleshooting!
    If you follow the driver's advice first to dismantle the pump, and then can not help but carry out a series of tests on the pump, so that not only without success and will cause unexpected man-made failure, and the car's gasoline more or less Cause loss. As a repairman should first be able to choose a safest, reliable and effective way to test, why choose the pump power cord test? The first direction is the line connecting the oil pump and the main relay through its test both reflect the performance of the main relay can determine the quality of the pump is good or bad, and this test point is the most convenient measurement, easy to achieve! I believe that in the troubleshooting, especially circuit failure, the "key point" of the choice is essential, which not only reflects the maintenance staff familiar with the structure of the situation, but also reflects the quality of their thinking quality! In addition, the author also found that a maintenance staff on the principles of troubleshooting and experience at the same time, should find their own ideas to reflect the thinking. This improves faster!