Why did the car start jumping around?

At start-up, especially at cold start-up, the throttle valve is dirty, and carbon deposition leads to insensitive rotation of the on-off valve, which affects the accuracy of the gas mixture concentration parameter or the sensor cannot accurately feedback the servo. Just disassemble and clean the throttle valve.

It may also be caused by excessive carbon deposition in the engine. Let's introduce the fault phenomenon caused by carbon deposition in various parts. Cleaning the throttle valve is mainly aimed at the unstable idle speed of the engine and easy flameout. When too much carbon is deposited in the combustion chamber, the compression ratio of the engine will increase and many hot surfaces will be formed, which will cause premature combustion and deflagration, shorten the service life of the engine and greatly reduce the power and economy of the engine. Carbon deposition in the nozzle will cause different fuel injection quantity of each cylinder nozzle, resulting in engine jitter or blockage; When there is too much carbon in the spark plug, the spark plug will not work because of air leakage, and the engine will shake. Too much carbon deposit in the throttle valve leads to unstable idle speed, decreased power and even automobile failure. Also check whether the idling of the motor is caused by too much carbon deposition. When you know the fault code in the store, it is recommended that you read the data stream to check the cause of the specific fault.

(Photo/Text/Photo: Shi Lili) @20 19