The car shakes. Is there carbon deposit somewhere? What does it mean when the car shakes when starting in first gear?

The car should be running smoothly. If it jerks or shakes suddenly, you should pay attention to whether there is any fault to avoid potential safety hazards. Generally, when the car shakes, it is considered to be a problem of carbon deposits. Let's learn about it together.

The car is shaking. Is it because of carbon deposits?

Spark plug carbon deposits

If the insulator between the center electrode and the side electrode of the spark plug turns yellow, it is also a kind of carbon deposit, which may cause leakage at high voltage, part of the ignition energy will be leaked, the spark energy will be weakened, or even no spark will be generated.

Throttle carbon deposits

Severe carbon deposits on the throttle valve can cause idle jitter or fluctuation;

Carbon deposits on the throttle valve plate will change the flow characteristics at small openings, and even cause unstable flow or valve plate jamming;

If there is an idle motor, the driving force of the idle motor is limited. Due to the influence of carbon deposits, it may lose step, that is, the actual opening size is different from the control value of the computer.

Carbon deposits on intake duct and valve stem

There is serious carbon deposit here, which will disrupt the fuel evaporation and atomization process during the transient operation of the engine, causing the air-fuel ratio of the mixture to deviate from the ideal value during transient conditions and causing acceleration jerks.

Carbon deposits on the combustion chamber wall

It will lead to pre-ignition, which means that the mixture is ignited by the hot spot on the combustion chamber wall before the spark plug jumps.

Depending on the timing and degree of pre-ignition, the degree of engine shaking or vibration will also be different, and in severe cases, strong vibration will occur.

What does it mean when the car starts shaking in first gear?

First, check whether the engine is underpowered due to aging parts, or whether the connection between the transmission and the chassis is loose, and then check whether the clutch disc and the clutch friction plate are engaged unevenly. If so, they can only be replaced.

After the engine's oil cylinder has been running for a long time, the speed at which the fuel injector sprays fuel will not be as regulated as that of a new car, and the fuel injection will be uneven. In other words, the sprayed oil cannot meet the engine speed (the gear cannot reach the speed).

It is recommended to go to a large repair shop for a thorough inspection. If you keep doing this for a long time, it will not only make driving or riding in the car uncomfortable, but it will also pose a safety hazard.

Is it normal for the vehicle to vibrate when the air conditioner is turned on?

Simply turning on the vehicle's air conditioner will have an impact on power because the air conditioning compressor is driven by the engine.

It is abnormal for the vehicle's engine to shake when the air conditioner is turned on. If the engine shakes slightly or intermittently, it may be caused by carbon deposits, dirty throttle, working condition of spark plugs, whether the air conditioner pressure is too high, etc. If it shakes severely, you may have to consider whether the piston compressor is stuck. When an engine is loaded, the speed regulating valve pressure is too low and it will also shake.