What causes the idle speed to fluctuate when the air conditioning is on?

1 Answers
VanJoshua
07/30/25 1:42am
When the air conditioning is turned on, the engine load increases. If there are any issues with the vehicle, it may lead to unstable idle speed, causing the RPM to fluctuate. Common causes include the following: 1. Excessive carbon buildup: Severe carbon deposits inside the engine can cause idle speed fluctuations when the air conditioning is on. 2. Ignition system issues: It's necessary to check the vehicle's spark plugs and high-voltage wires. If the ignition system is not functioning properly, it can lead to this situation, resulting in unstable idle speed. 3. Unstable fuel system pressure: If the fuel pump cannot supply fuel to the vehicle properly, it may cause poor fuel atomization or failure to open the fuel injectors, leading to idle speed fluctuations when the air conditioning is on.
Was this review help?
12
2
Share
More Forum Discussions

Does the Tayron have a manual transmission?

Tayron does not have a manual transmission, all models are equipped with a 7-speed dual-clutch transmission. The following are the differences between automatic and manual transmissions: Different operation difficulty: Manual transmissions mainly rely on the driver stepping on the clutch to complete gear changes. Manual transmission cars allow drivers to better experience the thrill of climbing hills, accelerating, and the joy of driving. Automatic transmissions mainly rely on the hydraulic transmission principle of the torque converter to automatically complete gear changes. Different safety levels: Although coasting in neutral with a manual transmission saves fuel, the car loses power, especially during turns, which can lead to risks such as understeer and tail flicking. Additionally, if the engine stalls at idle, the car will lose steering assistance and braking, increasing safety hazards during driving. Automatic transmission cars, since they cannot be driven in neutral, always maintain power support throughout the journey, making this driving method safer.
12
2
Share

Will a motorcycle be automatically deregistered if it hasn't undergone annual inspection for three years?

Motorcycles that haven't undergone annual inspection for three years will be automatically deregistered. Motorcycle annual inspection schedule: The annual inspection schedule for motorcycles is based on the purchase date. New motorcycles only require inspection every 2 years within the first 4 years of purchase, while those over 4 years old need annual inspection. For the inspection, you just need to drive the motorcycle and bring the original owner's ID card, original vehicle registration certificate, tax payment certificate for vehicle and vessel tax, and compulsory insurance policy to a qualified local institution to complete the annual inspection. Motorcycle annual inspection location: Motorcycles should undergo annual inspection at the vehicle management office in their registration location (where the license plate was issued). Motorcycles require inspection every 2 years within the first 4 years, and annually thereafter.
3
0
Share

How Does a Manual Transmission Work?

Manual transmission consists of gear sets with different gear ratios. Its basic working principle is to achieve gear ratio changes by switching between different gear sets. Introduction to manual transmission: A manual transmission is a gear-shifting device used to alter the speed and torque transmitted from the engine to the driving wheels. It enables the vehicle to obtain varying traction and speed under different operating conditions such as starting from a standstill, climbing hills, turning corners, and accelerating, while also allowing the engine to operate within a more favorable range. Maintenance of manual transmission: If mineral-based gear oil is used in the transmission, the transmission fluid should be replaced every 3 years or 60,000 kilometers. If synthetic oil is used, the transmission fluid should be inspected regularly. For cleaning the transmission, it is recommended to visit a professional repair shop equipped with specialized transmission cleaning devices to ensure optimal fluid replacement during transmission operation.
17
0
Share

What are the effects of overfilling engine oil in a truck?

The adverse effects of overfilling engine oil in a truck are as follows: 1. Increased fuel consumption and reduced power: If too much lubricating oil is added, intense agitation will occur among engine components during operation, leading to increased internal power loss. The elevated oil level also increases oil churning losses as the crankshaft encounters greater resistance, resulting in poorer power output, sluggish acceleration response, louder engine noise, and higher fuel consumption. 2. Decreased engine power: Excessive oil entering the combustion chamber significantly increases carbon deposits, raising piston movement resistance and reducing engine power. 3. Failed emission standards: Increased oil entering the combustion chamber worsens exhaust emissions, potentially damaging the catalytic converter in severe cases. 4. Oil leakage: Vigorous oil agitation raises crankcase pressure, accelerating the aging and deformation of crankshaft oil seals, eventually causing oil seepage and shortening lubricant service life.
19
5
Share

What is the actual range of a Tesla?

In terms of power, Tesla offers three different battery capacities for consumers to choose from: 40 kWh, 60 kWh, and 85 kWh. These three different capacity batteries provide the vehicle with a maximum cruising range of 256 kilometers, 370 kilometers, and 480 kilometers, respectively. For charging methods, the car can be charged using either a traditional socket or a charging station. More information about the Model X is as follows: 1. Design: The front face of the Model X adopts Tesla's latest family-style design, without a grille, further highlighting its identity as an electric vehicle. The most notable feature is the rear falcon-wing doors, which are very rare among SUV models. The rear of the Model X has a rounded shape, equipped with LED taillights and a spoiler to enhance driving stability. 2. Configuration: The Model X is equipped with an advanced Autopilot automatic driving assistance system, which is also available on the Model S. Autopilot allows the driver to operate the vehicle with ease on urban roads and highways. Once Autopilot is activated, the driver can relax in the car, as the system continuously monitors and responds in real-time to acceleration, deceleration, and whether the vehicle stays in the center of the lane. This helps prevent excessive fatigue for the driver during operation.
16
3
Share

What is the difference between buying from Tesla's official website and a 4S store?

Tesla's 4S stores not only provide users with a complete service integrating test drives, car ordering, delivery, and after-sales service. Buying from Tesla's official website not only simplifies the purchasing process but also, through direct sales on the official website, allows Chinese consumers to truly enjoy a nationally unified price. The sales methods also align with current trends, such as online reservations and online payments, which are favored by young people. More information about Tesla is as follows: 1. Introduction: Tesla is a famous American new energy vehicle company, probably one of the best electric vehicle manufacturers in the world, with high global recognition and sales that are among the top for pure electric models. 2. Models: Tesla's current models are divided into two versions: the high-performance version and the long-range version, with ranges of 595 kilometers and 590 kilometers, respectively. These figures are quite high and are difficult for many electric vehicles to reach.
16
0
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.