Why Does a Car Have Unstable Idle Speed?

1 Answers
OEmersyn
07/29/25 9:46pm
Reasons for unstable idle speed and shaking in cars include: 1. Severe carbon buildup in the engine. 2. Dirty throttle body or carbon deposits in fuel injectors. 3. Faulty spark plugs, high-voltage wires, or ignition coils leading to poor ignition system performance. 4. Unstable fuel pressure, insufficient fuel pump supply pressure, or incorrect readings from the intake pressure sensor. 5. Clogged fuel lines causing inadequate fuel supply. 6. Aging engine components. Solutions for unstable idle speed and shaking: 1. Clean carbon deposits from the engine and idle speed control valve. 2. Clean the fuel system. 3. Replace spark plugs, high-voltage wires, and ignition coils. 4. Clean the air filter and throttle body. 5. Replace aging engine components.
Was this review help?
12
5
Share
More Forum Discussions

What Are the Benefits of Waxing in Winter?

Waxing in winter offers the following benefits: 1. Sun protection, guarding against UV rays. 2. Resisting corrosion and protecting against damage from acid rain and acid snow. 3. Preventing static friction. 4. Waterproofing and anti-icing, protecting the car paint. More information about car waxing in winter is as follows: 1. In northern regions, winter is cold and dry, and cars are inevitably exposed to snow, ice, and sandstorms, which can cause the car paint to lose its gloss prematurely. Regular washing and timely waxing can effectively prevent damage from acid snow and resist corrosion. 2. The intensity of UV rays in winter is 20% weaker than in summer. Winter air is dry and thin, allowing light to penetrate more easily, making UV damage to the car body more threatening than in midsummer. Regular polishing and waxing of the car body can effectively resist UV rays, providing good sun protection during winter.
18
4
Share

Is it okay to unplug the charging cable before the new energy vehicle is fully charged?

Occasionally doing this a few times will not have much impact on the vehicle, it just means the battery misses a few balancing cycles. However, doing this frequently over time may damage the car battery. Charging methods for new energy vehicles: To date, there are only two charging methods for new energy vehicles: fast charging and slow charging. Fast charging and slow charging are relative concepts. Generally, fast charging refers to high-power DC charging, and most new energy vehicles that support fast charging can reach 80% capacity in about half an hour. Slow charging is simply AC charging, and the charging process usually takes 6 to 8 hours. Charging precautions: Extremely low battery levels can easily cause the power battery to become undercharged, and long-term undercharging can severely damage the power battery. When using an electric vehicle, it is best to practice shallow charging and discharging, and to charge frequently.
7
3
Share

What is the model number of the Peugeot 307 alternator belt?

6pk1700. Below are the detailed specifications of the Peugeot 307: 1. Introduction: The Dongfeng Peugeot 307 is an elegant and uniquely stylish vehicle. Its front fascia resembles the majestic face of a lion, with the two headlights shining like the lion's eyes, exuding authority without anger—a characteristic inherited from the Peugeot lineup. 2. History: Nine years ago, the first Dongfeng Peugeot 307, equipped with unparalleled automotive technology and the passion of a lion king, raced across the Chinese landscape. Today, refined through years of experience, the all-new 2013 Dongfeng Peugeot 307 makes its debut amid high expectations from consumers. Peugeot re-entered the Chinese market in 1997, seven years after the Guangzhou Peugeot 505 exited China. This time, its vanguard was a model that had already won 16 best car awards since its launch and was named the 2002 European Car of the Year.
19
5
Share

Can the Audi A4L be modified with an electric trunk?

Audi A4L can be modified with an electric trunk. Advantages of modifying to an electric trunk: The driver or passenger can control the opening and closing of the trunk by pressing the trunk switch on the vehicle, using the remote car key, or sensing operation in the corresponding area of the trunk with a hand or any object. In addition, the electric trunk also has several major advantages such as intelligent anti-pinch and height memory. Difference between sensing and electric: An electric trunk means that the vehicle's trunk can be opened and closed electrically. There is a door closing button inside the trunk door, and by touching this button, the trunk door can close by itself without human intervention. A sensing trunk means that there is a sensor installed under the trunk of the car, which can open or close the trunk through sensing. You can open the trunk by waving your foot under the sensor.
10
1
Share

How to Drive a Dual-Clutch Transmission?

Here are the correct methods for starting with a dual-clutch transmission: 1. When starting, make sure to press the brake pedal. Then shift into N (Neutral) to start the engine. After the engine starts, shift into D (Drive), release the brake, and gently press the accelerator for a smooth start. Avoid launch starts. 2. Always shift into N (Neutral) when parking. The principle of a dual-clutch transmission is similar to a manual transmission. When parking, the clutch is not fully disengaged. 3. Frequently use manual mode. Regular use of manual mode allows the transmission to develop a memory effect and operate according to your driving habits. This personalizes the driving experience and helps reduce shift frequency, thereby lowering the probability of malfunctions. Additional Information: Correct parking method for dual-clutch transmission: When parking, first press the brake pedal and wait until the vehicle comes to a complete stop. Then shift into N (Neutral), turn off the engine, and finally shift into P (Park) to complete the parking process.
15
1
Share

How many Chery 4S stores are there nationwide?

There are 500 Chery 4S stores nationwide. Chery Automobile's corporate culture: Sincerity and integrity, everlasting passion. Sincerity and integrity are the foundation of enterprise development, and only with passion can there be enthusiasm for work. Customers first, quality supreme. It is not the company but satisfied customers who provide employees with ideal salaries. Always pioneering, pursuing excellence. Pioneering is always arduous, and only by continuously pioneering can we talk about pursuing 'excellence'. Act immediately, improve daily. Use the strength of a large company and the flexibility of a small company to handle every matter. People-oriented, encouraging competition. First-class products are manufactured by first-class talents. Organizational optimization, team interaction. The exertion of organizational strength depends on the joint efforts of members within the organization, and the mechanism to maintain the exertion of organizational strength requires an optimized system. Beyond dreams, challenge limits. Analysis of Chery's industry competition structure: Competition among existing enterprises, analysis of potential entrants, analysis of substitute threats, supplier bargaining power, customer bargaining power.
14
5
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.