Golf cleaned the nozzle of the middle cylinder, changed the spark plug on the throttle, and the idle speed was still unstable and a little shaky.

It will cause insufficient combustion of gasoline and make the engine shake. The influence of engine carbon deposition on automobiles is considerable. First, the engine power is reduced, that is, the power output is uneven and gradually decays, in other words, it is getting less and less powerful. The second is to increase fuel consumption and increase your economic burden. Third, it is difficult to start a cold start, that is, it is difficult to strike a light and it is not easy to catch the car. Finally,

firebox

Severe carbon deposition can also lead to cylinders.

knock

There is noise during low-speed acceleration, which causes damage to the piston and crankshaft and causes high temperature of the engine, thus seriously affecting it.

Automobile safety

. Then the discharge exceeds the standard, which not only fails the annual inspection, but also directly aggravates the harm of environmental pollution.

Another reason is:

throttle valve

Something happened. The above two problems will cause engine jitter and unstable speed.