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Why does the car's idle speed fluctuate up and down?

1 Answers
LukasFitz
07/25/25 2:41am
The fluctuating idle speed of a car is caused by a faulty carbon canister, and replacing the car's carbon canister can resolve the issue. Below are specific details about the car's carbon canister: Installation and Function: It is installed between the fuel tank and the engine, utilizing the adsorption capability of its internal activated charcoal to absorb and store gasoline vapors from the fuel tank. Working Principle: When the engine starts, the solenoid valve between the activated charcoal canister and the intake manifold opens according to the ECU's command. At this point, the gasoline vapors inside the activated charcoal canister are drawn into the cylinder along with the air under the vacuum pressure of the intake pipe to participate in combustion. This not only reduces unnecessary emissions but also lowers the engine's fuel consumption.
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What are the rules for self-selecting license plate numbers on 12123?

The rules for self-selecting license plate numbers on 12123 are as follows: Verification attempts: There are a total of 20 opportunities for failed verifications (this may vary by region, with 20 being the maximum number of attempts). Note: Do not randomly input numbers for searching. Whether the edited number is already in use will be a critical factor. Information about 12123 is as follows: 12123: It is the official mobile client APP of the internet-based comprehensive traffic safety service management platform under the public security department. Main functions include: user registration, appointment scheduling for motor vehicle driver tests, binding of motor vehicles and driver licenses, pre-selection of new vehicle license plates, replacement of vehicle registration certificates, replacement of motor vehicle license plates, replacement of driver licenses, replacement of inspection stickers, extension of driver license renewal, extension of review, extension of submission of physical condition certificates, handling of traffic violations recorded by electronic monitoring devices, online self-service for processing traffic violations, inquiries and notifications related to motor vehicles and driver licenses, and navigation to locations for handling traffic management-related services.
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What are the scheduling principles for the 12123 exam booking system?

12123 exam scheduling principles include: Based on registration time: The ranking is determined by the time of the previous exam. For Subject 1, the ranking is based on the registration time. Based on the previous exam time: For Subject 2, the ranking is determined by the time of the previous exam (either the passing time of Subject 1 or the failure time of Subject 2), and the same applies to Subject 3. Subject 1 exam: If passed in one attempt, it generates a priority ranking for the Subject 2 exam. Information about 12123 is as follows: 12123: It is the official mobile client APP of the internet traffic safety comprehensive service management platform by the public security department. Main functions include user registration, motor vehicle driver exam booking, binding of motor vehicles and driver's licenses, pre-selection of new vehicle license plates, replacement of vehicle registration certificates, replacement of motor vehicle license plates, replacement of driver's licenses, replacement of inspection qualification marks, deferred renewal of driver's licenses, deferred review, deferred submission of physical condition certificates, handling of traffic violations recorded by electronic monitoring devices, online self-service for traffic violation handling, query and notification of motor vehicle and driver's license-related information, navigation to traffic management service locations, etc.
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Can 12580 vehicle relocation service check out-of-town license plates?

12580 vehicle relocation service cannot check out-of-town license plates. The specific details are as follows: Reason: 12580 can only assist with vehicle relocation and cannot disclose personal information, as vehicle owner information is considered personal privacy and is not publicly available. Who can check: Only traffic police and law enforcement officers have the authority to check. Information about 12580 is as follows: 12580: This is a comprehensive information service platform provided by China Mobile for its customers. Regarding privacy protection: 12580 operates with relatively strict protocols. During the entire vehicle relocation process, only the vehicle owner can see the phone number dialed by the other party, while the owner requesting the vehicle relocation cannot see the phone number associated with the corresponding license plate. On the hotline information platform, operators can only see the user's specific number during registration and entry, and in subsequent transfer processes, they can only connect both parties through the license plate number.
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Can a 2021 National V Used Vehicle Be Transferred Across Provinces?

2021 National V used vehicles can be transferred across provinces. The specific details are as follows: Local transfer: Generally, there are no restrictions on the emission standards for used vehicles in local transfers. As long as the vehicle has not reached the mandatory scrapping standard, it can be transferred normally. For out-of-province transfers, please note: If the used vehicle is being transferred from another province, it must comply with the local emission standard policies to be eligible for transfer. Information regarding the National V standard is as follows: National V standard: The fifth stage of national motor vehicle pollutant emission standards, with control levels equivalent to the fifth stage emission standards currently implemented in Europe. Differences: Compared to the National IV standard, the new standard reduces nitrogen oxide emissions from light-duty vehicles by 25% and from heavy-duty vehicles by 43%.
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Is there a big difference in power between 125 and 150?

125 and 150 have relatively large differences in power. The specific differences are as follows: In terms of power: The maximum power of a 150 engine can reach around 8.8, while the power of a 125 engine is only about 7.4. In actual road driving: The top speed of a 50 motorcycle can reach 120KM per hour, while the top speed of a 125 motorcycle can reach 95KM per hour. Relevant information about motorcycles is as follows: Motorcycle: A two-wheeled or three-wheeled vehicle driven by a gasoline engine, steered by handlebars to control the front wheel, lightweight and flexible, fast-moving, widely used for patrol, passenger and cargo transportation, etc., and also used as sports equipment. Classification: Motorcycles are divided into street bikes, road racing motorcycles, off-road motorcycles, cruisers, touring bikes, etc.
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Can I choose a license plate number on 12123 every day?

You cannot choose a license plate number on 12123 every day. Online number selection is a one-time process. During the selection process, the chosen number will be temporarily reserved for the owner to confirm and complete the registration. If the registration is not completed within the specified time, the selected number will be invalidated, and you will not be able to select a number online for the next 2 years. In such cases, you will have to visit the local vehicle management office for on-site number selection. The specific details are as follows: Prepare in advance. First, in areas with license plate restrictions, ensure you have obtained the required quota. Then, schedule an online number selection appointment via the online vehicle management office or their customer service hotline. Online selection can only be done one day before the scheduled appointment date. Additionally, prepare the vehicle's certificate of conformity in advance, as you will need to input the vehicle's VIN or certificate number, or the import goods certificate number during the process. Log in to the 12123 APP and navigate to the [Business Center] to find the [New Vehicle Number Selection] option. In the basic information section, select and confirm the city for license plate registration, then click [Confirm Information]. A dialog box with service terms will pop up—read carefully and click [Read and Agree]. In the vehicle information section, enter details such as the certificate number, vehicle brand, and VIN, then click [I Confirm the Information is Correct]. A verification code input box will appear. Obtain the verification code via SMS, enter it, and click [Confirm]. After confirming the vehicle's basic information, proceed to the pre-selection phase. Click [Start Selection], then obtain and enter the SMS verification code before clicking [Next]. There are two methods for selecting a license plate number: random selection and self-composed selection. There is no fixed order for these methods, but it is recommended to try random selection first. If you don’t find a satisfactory number, switch to self-composed selection. After completing the selection, the system will prompt you to visit the vehicle management office within the specified time to complete the registration. Failure to do so will result in the selected number being invalidated, and you will be barred from online selection for two years.
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