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List of contents of this article:

• 1,< A href='#What is the reason for high idling speed of cars' title='What is the reason for high idling speed of cars'>What is the reason for high idling speed of cars
• 2、What are the fault causes of excessive idling engine
• 3, What is the reason for the high idling speed of the car
• 4
  、 What is the reason for the excessive idling speed of the car?

What is the reason for the high idling speed of the car

1. The high idling speed of the car is usually caused by the following reasons: when the engine water temperature is low, the air conditioner is turned on, and the engine voltage is low, the ECU program design should be improved appropriately. Idling speed, this is a normal situation. If the engine water temperature is normal, the air conditioner is not turned on and the idle speed is high, it means that the system is faulty, which may be an electronic control system or a mechanical system failure.

2. Failure of the ignition system. The idling jump may be due to the failure of the ignition system, such as the damage of the spark plug, which needs to be replaced. In addition, there may be a problem with the high-voltage wire and ignition coil, which can be judged by the car computer and then repaired specifically. The oil pressure is abnormal.

3. The high idling speed of the car may be due to the failure of the throttle valve.If the throttle valve is too dirty, it will cause an error in the opening of the throttle valve, the sensitivity of the throttle valve will be reduced, and it may not close in place when idling, resulting in abnormal idle speed. In addition, throttle failure also affects the power, acceleration performance and fuel consumption of the engine, and even causes difficulty in starting in serious cases.

4. The idling speed is too high mainly for the following reasons: the idle switch is not closed; the idling control valve is faulty; the intake pipe is leaking; the gas distribution phase is wrong; the fuel injector is dripping or blocked; the exhaust system is blocked; the EGR valve is open during idling conditions. The idle speed of a car refers to a working condition. When the engine is idling, it is called idling, that is, the gear of the car is idle.

5. Common problem factors that cause high idling speed of cars include throttle lag and tight closure, idling control valve problems, water temperature sensor problems, air intake system leakage, air conditioning switch and power steering pressure switch problems, etc.

6. The high idle speed of the car may have the following reasons: Air filter blockage: Air filter blockage will cause insufficient air flow, and the engine will not be able to burn fuel normally, resulting in high idle speed. Fuel system failure: Fuel system failure may lead to insufficient fuel supply or uneven fuel injection, resulting in high idling speed.

What are the fault causes of excessive engine idling

1. Excessive air intake or incorrect engine control signals will lead to excessive idling.

2. [Pacific Automobile Network] Excessive idling speed is caused by excessive air intake or engine control signal error when idling.

3. The engine carbon accumulation is serious. Excessive carbon accumulation inside the engine is one of the common causes of idling. In the case of excessive carbon accumulation, the gasoline sprayed by the fuel injector during cold start will be absorbed by a large amount of carbon accumulation, resulting in excessive mixing gas during cold start, which will be more difficult for cold start.

4. The reasons for the engine idle speed are as follows: air intake pipe leakage, fault analysis, by the engine'sIt can be seen from the principle of idling control that under normal circumstances, the opening degree of the idle speed control valve and the air intake volume strictly follow a certain functional relationship, that is, the opening degree of the idle speed control valve increases, and the air intake volume increases accordingly; high rotational speed is generally the reason for excessive carbon storage.

5. When the car is idling, the speed of the engine will remain within a certain range. If the idling speed of the car becomes high for a long time, it may be one of the following reasons: the air filter needs to be replaced or cleaned.

6. Fault analysis When the internal part of the three-effect catalytic converter is partially blocked due to carbon accumulation, breakage and other reasons, the exhaust resistance will be increased, reducing the negative pressure of the intake pipe, resulting in poor engine exhaust and insufficient air intake, resulting in poor engine performance, idling shaking, and may also cause EC U memory about the fault code of the air flow sensor.

What is the reason for the high idling speed of the car

1. Generally speaking, the main reason for excessive idling speed is that the air intake is too large or the engine control signal is wrong when idling.

2. The air flow meter is dirty. The air flow meter is dirty, which may lead to a decrease in air intake, which indirectly causes the vehicle to jump when idling. The air flow meter needs to be cleaned in time. The fuel injector is faulty.

3. There are many reasons for the high idling speed of the car. If there is a high idling speed, we should focus on the ignition and air intake of the engine. The common reasons for the high idling speed of the car are the throttle stuck and loose closure; the failure of the idling control valve; the failure of the water temperature sensor; the leakage of the air intake system; the failure of the air switch and the power steering pressure switch, etc.

4. The main reasons for excessive idling speed are as follows: the idling switch is not closed;The idling control valve is faulty; the intake pipe is leaking; the gas distribution phase is wrong; the fuel injector is dripping or blocked; the exhaust system is blocked; the EGR valve is open during idling conditions. The idle speed of a car refers to a working condition. When the engine is idling, it is called idling, that is, the gear of the car is idle.

What is the reason for the excessive idling speed of the car?

The reasons for the high idling speed of the car are: throttle jam and loose closure; idling control valve failure; water temperature sensor failure; air intake system leakage; air conditioning switch and power steering pressure switch failure.

Generally speaking, the main reason for excessive idling is excessive air intake or the engine control signal error when idling.

High idling speed of cars is usually caused by the following reasons:When the engine water temperature is low, the air conditioner is turned on, and the engine voltage is low, the ECU program design should appropriately increase the idle speed. This is a normal situation. If the engine water temperature is normal, the air conditioner is not turned on and the idle speed is high, it means that the system is faulty, which may be an electronic control system or a mechanical system failure.