What happens if there is carbon deposit in the car?

1, the power output is unstable when accelerating or overtaking, and the engine is accompanied by dull noise. Due to excessive carbon deposition in the engine, the oil supply is not timely, which leads to the problem of power connection failure. At this time, it is best to drive to the 4s shop, and if necessary, ask the maintenance technician to check and clean up the carbon deposit.

2. It is more difficult to start a cold car, and the fuel consumption continues to rise. First of all, it is difficult to check whether there is a problem with the battery before the cold car starts. If the battery is normal, it is basically caused by excessive carbon deposition. Moreover, during normal driving, fuel consumption will also increase, because serious carbon deposition will reduce the combustion efficiency of the mixture in the cylinder, and it will also be accompanied by problems such as increased idle speed. If so, it can be concluded that the engine has serious carbon deposition and should be cleaned in time.

3, the tail gas is pungent, and there are a lot of sludge and colloidal substances in the exhaust pipe. Serious carbon deposition in the engine will lead to insufficient combustion of the mixture, and the discharged substances will accumulate on the exhaust pipe. If you find a lot of black oil stains and watery substances when wiping with paper towels, it usually means that the carbon deposition is serious and the oil may burn.

Resulting in engine performance degradation.

1, power down

The main reasons for serious power drop caused by carbon deposit are: carbon deposit in spark plug weakens ignition ability or leads to ignition failure, and air leakage in cylinder (at valve and piston) leads to pressure drop, which is more obvious at high load or low speed.

2. Fuel consumption is rising.

The reduction of power will be accompanied by a certain increase in fuel consumption, because to obtain the same power as before carbon deposition, it is necessary to increase the throttle opening and increase the corresponding fuel supply. Therefore, when the fuel consumption increases for unknown reasons, it is necessary to check whether there is carbon deposition in the cylinder.

3. The emission of tail gas pollutants increased.

Usually, the emission of pollutants in the exhaust gas will increase during the annual inspection of automobiles. At present, only carbon monoxide, hydrocarbons and nitrogen oxides are detected, and all three indexes can rise or exceed the standard when carbon is deposited, which may appear earlier than the decline of power and the increase of fuel consumption.

4. Other changes

There may also be difficulties in cold start, abnormal noise during acceleration, etc. When the piston carbon deposit is serious, it may cause the piston ring to get stuck, scratch the cylinder wall and cause serious air leakage (cylinder pulling).