How to judge the gasoline pump is broken

Method 1: Turn on the ignition switch, do not start the engine, you can hear the petrol pump working for 1 to 2 seconds, you can judge whether the petrol pump is working.

Method 2: Unplug the fuel pump relay, connect the fuel pump circuit with a dedicated jumper, turn on the ignition switch, do not start the engine, the fuel pump can work, indicating that the fuel pump is normal.

Method 3: Connect the oil pressure gauge to see if the engine can establish an oil pressure of about 250KPa, and whether the oil pressure is 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 quickly released (whether the oil pressure drops quickly) to determine whether the oil pump's relief valve is normal (normal oil pressure can be maintained so that the engine can start normally next time).

Method 4: Connect the circuit to the fuel pump, and use a special measuring tool (such as a beaker) to measure whether the fuel output and return of the fuel pump are normal.

The symptoms of a broken gasoline pump are manifested in the following aspects:

When the gasoline pump is broken, there is usually a lack of acceleration, and there is a phenomenon of azole car when refueling.

It is not easy to start when starting, and it takes a long time to press the key.

Abnormal noise, buzzing sound when driving.

The engine fault light is on. 5 The engine shakes abnormally.