What will happen to the car if there is too much carbon deposit?

Excessive carbon deposition will lead to poor vehicle acceleration, difficult starting, unstable engine idle speed, increased fuel consumption, excessive exhaust emissions, engine failure and other problems.

1, poor car acceleration.

Carbon deposition reduces the intake passage and inflation coefficient, which leads to the increase of cylinder pressure, delay of ignition time and decrease of engine power.

2. It is difficult to start the vehicle.

Carbon deposits fall into the passage of the intake valve seat, which will cause insufficient cylinder pressure. When starting, the injected fuel is adsorbed by carbon deposits, which leads to the lean mixture in the cylinder and the engine can't start normally.

3. Engine idling is unstable.

When carbon deposits are attached to the intake valve and throttle valve, the engine cannot accurately control the amount of gasoline and air sent into the combustion chamber, resulting in unstable idle speed of the engine.

4. Increased fuel consumption

When carbon deposits accumulate in the combustion chamber, it is easy to cause knocking, which delays the ignition time of the engine, reduces power and increases fuel consumption by 4~5%.

5. Exhaust emission exceeds the standard.

Carbon deposition leads to an imbalance in the mixing ratio of gasoline and air, which leads to insufficient combustion of gasoline, an increase in the contents of CO and HC in tail gas, and the emission is not up to standard.

6. Engine failure

When carbon deposits are attached to the intake valve stem, the valve stem and the guide pipe will be stuck, which will cause the piston to hit the valve and the engine to sound abnormally, resulting in damage to the intake valve and the piston.