The car is cold and lacks a cylinder. It will be fine if it is hot. What is the reason?

There are many reasons for the obvious lack of cylinder when the car is cold. The most common reasons are valve carbon deposit, throttle carbon deposit and piston top carbon deposit. Other common reasons are:

1, the most common is that the spark plug gap is too large. If the spark plug gap is too large or the electrode is seriously worn, it will lead to insufficient ignition energy when the car is cold. The solution is to replace the spark plug.

2. Check the gasoline filter and oil pump. When the car is cold, the temperature is low, the viscosity of the engine oil is low, and the gasoline filter is blocked, which leads to the lean mixture of the car and the engine jitter is similar to the lack of cylinder. Solution: You can replace the gasoline filter first, and if the fault still exists, you should replace the oil pump.

3. The fuel injector is blocked. This is common in direct injection engines. The nozzle of in-cylinder direct injection engine extends directly into the cylinder, so the carbon deposit produced during combustion may attach to the nozzle, causing the nozzle to be blocked. Solution: Replace the fuel injector.

When the cold car is short of cylinders, the following phenomena will occur:

1, abnormal engine operation or insufficient power. 2. Jitter obviously increases the noise. 3, the exhaust pipe smoke and shooting. 4. Fuel consumption increased.

Harm caused by cylinder shortage of auxiliary engine;

1. Engine speed and power decrease.

2. Increase fuel consumption and emission pollution.

3. Intensify the wear of moving parts and shorten the service life of lubricating oil.