What is the problem when the car flashes while driving?

If you have cleaned the fuel injector and throttle, you can basically conclude that the cause of the fault phenomenon is "unbalanced fuel injection", which affects the air-fuel ratio.

However, there are many reasons for uneven fuel injection, which need to be checked one by one. The items to be checked are as follows:

1, air intake system: first check whether the air filter is too dirty, then check whether the air intake pipe leaks, and finally check whether the signal of the air flowmeter is distorted;

2. Fuel supply system: First, measure the fuel pressure to determine whether there is a problem with the system. If the fuel pressure is unstable, it indicates that there is something wrong with the system, and it is necessary to check the fuel pump, fuel filter and fuel pressure regulator;

3. If no abnormality is found when checking the air intake system and fuel supply system, check the coolant temperature sensor, throttle position sensor, camshaft and crankshaft position sensor and oxygen sensor.

Through the above inspection, the cause of the problem should be easy to find. There are many parts that need to be checked, but they are all relatively easy to check and need the patience of the repairman.

—— Beijing Benz Automobile Service Center