How to judge whether there is carbon deposition?

Check the idle status. Under normal circumstances, the neutral idle speed is about 900 rpm;

Slight carbon deposition: unstable idle speed and jitter;

Serious carbon deposition: difficult to start, increased fuel consumption, weak acceleration, abnormal idle speed and even easy to stall.

First, the treatment method:

1, slight carbon deposition: increase the rotation speed (note: not high speed), rotate at 5000 rpm for 20 minutes, and the medicine will cure the disease.

2. Serious carbon deposition: you can only go to the maintenance station for professional cleaning.

Second, the harm of carbon deposition:

The power performance and acceleration performance decrease, the fuel consumption increases, the service life of three-way catalysis and oxygen sensors is shortened, and the emission situation deteriorates;

The oil consumption is obviously increased, the service life of gasoline pump and gasoline filter is shortened, and the service life of engine system components such as spark plugs is shortened.

Third, preventive measures:

Please read the instructions carefully, shift gears according to the specified speed range, and don't idle for a long time, or even climb at an idle speed.

Fourth, other matters needing attention

After the automobile engine runs for 1-2 years (about 20000 kilometers), its performance will decline to some extent. Its manifestations are as follows:

Economic performance declines and fuel consumption increases;

Insufficient power, rapid acceleration is not smooth;

The start is not smooth, especially when the cold car starts;

Idle speed is unstable, trembling or even oil collection and flameout;

Exhaust emission exceeds the standard;

Increased noise;

The blackening speed of engine oil is accelerated, and even the engine oil is slightly burnt.

reference data

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