Mixed gas regulation of single-point gas vehicle

The mixing ratio should be accurately called "air-fuel ratio". In general, in order to ensure the minimum emission pollution, the theoretical air-fuel ratio is: 14.7: 1.

When the mixture is too rich, the following phenomena will occur:

The engine is difficult to start, the acceleration is insensitive, and the exhaust pipe emits black smoke accompanied by a "sudden, sudden" sound. After the engine is turned off, gasoline leaks from the throttle shaft, resulting in insufficient engine power and increased fuel consumption.

When the mixture is too dilute, the following phenomena will occur:

The engine is not easy to start; Idle running is unstable, and it is easy to stall; When driving, I feel that my motivation is insufficient. If it is serious, I will stop. When the engine is empty, it is difficult to increase the speed by stepping on the accelerator pedal, and the carburetor has backfire; The engine tends to overheat.

Extended data:

Matters needing attention

1, check the engine ignition coil and spark plug;

2. Check the working performance of relevant sensors, such as (front and rear) oxygen sensor, water temperature sensor, air temperature sensor, throttle position sensor, air flow meter intake manifold pressure sensor, etc.

3. Check the pollution degree of the air filter. If it is blocked, it will also lead to the phenomenon of excessive mixture, so it should be cleaned or replaced (as the case may be);

4. Check whether the fuel injector leaks and the working performance of the fuel pressure regulator. If the effect is not good, the mixture will be too rich. You can go to a professional 4S store to check the relevant sensors and engine computer controllers.