What Causes the Engine to Buzz During Acceleration?

Can the vehicle still be checked on 12123 after the transfer is completed?

After the vehicle transfer is completed, it can no longer be checked on 12123. Since the vehicle's personal information involves some private details, the transfer of vehicle ownership cannot be queried via phone or website, hence it cannot be found on 12123. The required documents for vehicle transfer are as follows: Types of vehicle transfer: Individual to company: Vehicle license, registration certificate, vehicle invoice, seller's ID card, seller's photo at the DMV, vehicle inspection (no violations), company organization code certificate copy with official seal (2 copies), application with official seal, blank paper with official seal. Company to company: Vehicle registration certificate, valid compulsory insurance, both parties' enterprise code certificates and official seals (copy, buyer's original), sales agreement, issuance of used car transaction invoice; fill out the transfer form at the DMV and process at the relevant window. Individual to individual: Vehicle license, vehicle registration certificate, vehicle purchase tax certificate, road maintenance fee receipt, insurance policy, vehicle and vessel use tax certificate, ID card.

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Does 'Application in Progress' for Subject 3 Mean Successful Booking?

If Subject 3 shows 'Application in Progress', it means the booking hasn't been successful yet. For the Subject 3 driving test, once the booking is confirmed, you will receive an SMS notification, and you can go directly to take the test then. Here are the specific details: Subject 3 Booking Time: Generally, the review process for Subject 3 booking takes 5-10 days. If you're in a first-tier city where there are many applicants, the time might be extended, with the latest notification being 3-5 days before the test. Subject 3 Test Content: The assessment for the motor vehicle driver's license Subject 3 includes preparation before getting on the vehicle, simulated light operations for starting, driving in a straight line, gear shifting operations, changing lanes and pulling over, going straight through intersections and turning left or right at intersections, passing through pedestrian crossings and school zones, etc. Some regions also include nighttime driving skill tests.

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What are the detailed standards for returning or exchanging cars under the new automotive three-guarantee policy?

The new regulations clearly stipulate that within 7 days from the start of the three-guarantee validity period for a household vehicle, if there is a quality issue requiring the replacement of the engine, transmission, power battery, drive motor, or their major components, consumers can choose to exchange the vehicle or request a refund by presenting the purchase invoice and the three-guarantee certificate. The seller must provide a free exchange or refund. The new regulations also introduce corresponding compensation requirements for consumers requesting a refund or exchange. It is explicitly stated that consumers must pay a usage compensation fee to the seller when exchanging or returning a household vehicle. The compensation fee is calculated as follows: Compensation Fee = Vehicle Price (yuan) × Mileage (km) / 1000 (km) × n. Here, the usage compensation coefficient 'n' is determined and clearly indicated on the three-guarantee certificate by the manufacturer. Compared to the 2013 version, the new regulation adjusts the compensation coefficient 'n' from the range of '0.5%-0.8%' to no more than 0.5%. This change lowers the upper limit of compensation fees that sellers can charge consumers who qualify for the '7-day refund or exchange' policy, thereby reducing the financial burden on consumers. The new regulations impose stricter three-guarantee responsibilities on businesses. Under the new policy, when sellers process a refund or exchange, they must compensate consumers for vehicle registration fees, decoration costs, and related service fees. Manufacturers, sellers, and repairers are prohibited from restricting consumers' freedom to choose maintenance and service providers and cannot use this as a reason to deny three-guarantee responsibilities. Additionally, the new regulation reduces the threshold for exchanging a vehicle due to repeated repairs from 'more than 5 repairs for the same issue or a cumulative repair time exceeding 35 days' to 'more than 4 repairs or 30 days' within the three-guarantee period.

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Can Diesel and Gasoline Be Mixed and Still Used?

No, it cannot be used. If diesel is added to a gasoline engine, the engine piston compression will cause the diesel to ignite prematurely, leading to knocking and cylinder scoring. The piston has not yet reached the top of its stroke, but the diesel has already exploded and transmitted power. It's like an athlete giving their all in the final sprint, about to reach the finish line, when suddenly someone rushes out and forcefully pushes them back. This kind of damage to the engine is severe. Below is relevant information: Hazards: It can easily cause carbon buildup inside the engine. Reason: The fuel injector pressure in a gasoline engine is not as high as that in a diesel engine. Therefore, when diesel is added to a gasoline engine, the injected diesel cannot be fully atomized, meaning some of it remains in liquid form and is directly sprayed into the cylinder. This leads to incomplete combustion, resulting in carbon buildup and even clogging the fuel injectors.

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What Happens If a Car Doesn't Have a Catalytic Converter?

The impact of not installing a catalytic converter on a vehicle includes the following: the engine emission warning light on the combination instrument panel will illuminate, and the vehicle's exhaust emissions will severely exceed standards; when the vehicle reaches the annual inspection period, it may fail to pass the inspection. Here is a detailed introduction to the function of the catalytic converter: The catalytic converter is installed between the engine exhaust manifold and the muffler. It converts harmful gases such as CO, CH, and NOx produced by engine combustion into harmless carbon dioxide, water, and nitrogen through oxidation and reduction reactions within the honeycomb-structured ceramic and precious metals inside the catalytic converter. The catalytic converter can simultaneously transform the three main harmful substances in exhaust gas into harmless substances, hence the name "three-way" (tri-functional) catalytic converter. Maintenance schedule for the catalytic converter: Regular cleaning every 30,000 kilometers: The catalytic converter in the exhaust pipe is not a consumable item. It primarily uses the catalytic effect of precious metals at high temperatures to purify harmful gases in the exhaust. If the exhaust is normal, the catalytic converter does not require maintenance. It is recommended to remove and inspect the catalytic converter after driving 30,000 kilometers to check its condition and perform maintenance if necessary. Maintenance when exhaust is abnormal: 30,000 kilometers is the normal maintenance interval. If there are issues with the exhaust, the first step is to inspect or maintain the catalytic converter. Normal vehicle exhaust should be colorless and odorless. If the exhaust is black or blue, it needs to be addressed and repaired as soon as possible. Black exhaust is caused by incomplete fuel combustion, which usually leads to excessive carbon deposits. Blue exhaust often indicates oil burning, which may cause the catalytic converter to be coated with lead and other components, leading to failure and ineffectiveness. Maintenance before annual inspection: If the vehicle needs to undergo an annual inspection, the catalytic converter should be maintained beforehand. Currently, exhaust emission testing is a critical part of the annual inspection. Many factors affect exhaust emissions, but the catalytic converter and oxygen sensor are the most important factors because they are purification devices and the final checkpoint. If they are faulty, the exhaust will definitely not meet the standards.

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How to Test the Quality of an Ignition Coil?

Methods for testing an ignition coil are as follows: 1. External Inspection. Visually inspect the ignition coil. If the insulation cover is cracked, the casing is damaged, or it has become damp and lost its ignition capability, it should be replaced. 2. Inspection for Open Circuits, Short Circuits, and Grounding in Primary and Secondary Windings. 1) Resistance Measurement Method. Use a multimeter to measure the resistance of the primary winding, secondary winding, and additional resistor of the ignition coil. The values should meet technical standards; otherwise, it indicates a fault, and the coil should be replaced. 2) Test Lamp Inspection Method. Connect a test lamp to the terminals of the primary winding. If the lamp does not light, it indicates an open circuit. To check for grounding faults, connect one end of the test lamp to the primary winding and the other end to the casing. If the lamp lights, it indicates a grounding fault. Short circuits are harder to detect with a test lamp. 3. Inspection of the Secondary Winding. One end of the secondary winding connects to the high-voltage socket, and the other end connects to the primary winding. During inspection, when one probe of the test lamp touches the high-voltage socket and the other touches the low-voltage terminal, if the lamp lights up brightly, it indicates a short circuit. If the lamp glows dim red, there is no short circuit. If the lamp does not glow at all, observe whether sparks occur when the probe is removed from the terminal. If no sparks occur, it indicates an open circuit in the winding. 4. Spark Intensity Inspection. 1) Electrical Test Bench Inspection. To check the high voltage generated by the ignition coil, it can be tested on a bench along with a distributor. Adjust the discharge electrode gap to 7mm, start at low speed, and once the ignition coil reaches operating temperature (60~70°C), adjust the distributor speed to the specified value. If it can continuously produce blue sparks within 0.5 minutes, the ignition coil is in good condition. 2) Comparative Spark Test Method. This method can be performed either on a test bench or in a vehicle. Compare the spark intensity of the tested ignition coil with that of a known good one. If the ignition coil has internal faults such as short circuits, open circuits, grounding, or if the spark intensity does not meet requirements, it should generally be replaced with a new one.

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What Causes the Engine to Buzz During Acceleration?

Can the vehicle still be checked on 12123 after the transfer is completed?

Does 'Application in Progress' for Subject 3 Mean Successful Booking?

What are the detailed standards for returning or exchanging cars under the new automotive three-guarantee policy?

Can Diesel and Gasoline Be Mixed and Still Used?

What Happens If a Car Doesn't Have a Catalytic Converter?

How to Test the Quality of an Ignition Coil?

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