Hyundai Elantra sedan intermittent stalling

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A mileage of about 36,000 km of the 2008 Hyundai Elantra sedan. Users reflect: the vehicle is in motion and sometimes stalled, some time after parking the car can be started.         After receiving the car: the road test, the engine began to lose power, until flameout. After starting the flame Tuirel S777 failure, 10min after a successful start, the initial judgment failures are caused by electrical problems. Use perform self-diagnosis, the engine system is not the fault codes. Perturbation method using lines to be checked, which would allow normal operation of the engine, artificial rock lines, while observing the changes in the status of the engine. When shaking the engine compartment relay box, shake violently after engine flameout. Removing the relay box, found at the bottom of a wire is loose, light hand pulled this wire, the terminal will fall out. Check circuit diagram, that the wire for the fuel pump power cord. Repair the terminal and re-inserted firmly installed relay box, commissioning, fault completely ruled out.          Check the line is bad occasional VDM UCANDAS failure is often time-consuming, because most of the time in the repeated trial, waiting for the failure to reproduce, low maintenance way this passive efficiency, take the guesswork, replacement parts and other methods are also desirable. This example can complete in a short-time troubleshooting, interest in artificially simulated fault conditions, the failure to make the point of failure in a critical state is exposed, the next repair work becomes a simple and effective.