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How to judge the fuel pump of the car is broken?

Date: 2020-06-09        Clicks: 631

Method 1: Turn on the ignition switch, do not start the engine, you can hear the gasoline pump working for 1 ~ 2 seconds, you can judge whether the gasoline pump can work; 

you can hear it in the cab, the electric door starts to emit a "hiss ... ."the sound of. However, if there is a problem with the fuel pump, it should not burn the car.



Method 2: Unplug the oil pump relay, connect the oil pump circuit with a special jumper, turn on the ignition switch, 

and do not start the engine, the oil pump can work, indicating that the oil pump is normal;



Method 3: Connect the oil pressure gauge to see if the engine can establish oil pressure of about 250KPa and whether the oil pressure can be established quickly. 

If the oil pressure can be established normally, the oil pump can work. 

Then turn off the engine ignition switch to see if the oil pressure is released quickly (whether the oil pressure drops quickly) to determine whether the pressure relief valve of the oil pump is normal

 (normal oil pressure can be maintained so that the engine can start normally next time).



The key words of this article:electric fuel pumps fuel pump motor fuel pump