What should I do if the engine shakes when the golf is turned off?

Excessive carbon deposition will cause premature combustion and deflagration, shorten the service life of the engine and greatly reduce the power and economy of the engine; There is carbon deposit on the working surface of the valve and its seat ring, which will cause the valve to close loosely, leak air, make the engine difficult to start, work ineffectively and make the valve easy to ablate. Carbon deposition and adhesion on the valve guide and valve stem will accelerate the wear of the valve guide and valve stem, and even cause the valve stem to move in the valve guide and get stuck, resulting in the failure of valve adhesion.

Carbon deposition in the piston ring groove will make the side clearance and back clearance of the piston ring smaller, or even no clearance, which will make the piston ring lose its elasticity and pull the cylinder; 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. The throttle and idle motor can be directly removed for cleaning; The air intake, intake valve and combustion chamber can be inspected by endoscope first. It is recommended that you use the method of spraying cleaning liquid from the spark plug hole to clean the carbon deposit in the combustion chamber. Pump a good carbon remover into the combustion chamber in the form of foam with special equipment to melt the carbon deposits in the combustion chamber, and then suck these liquid carbon deposits out of the spark plug hole. This method is the best non-disintegration method at present. It is recommended to check and replace the gasoline filter at the same time.