What is required for vehicle inspection in Beijing?

What to Do When There Are Problems with the Car's Transmission?

Transmission failure can lead to the following consequences: engine stalling when shifting gears; transmission lock-up; and the car not moving after engaging a gear. Below are solutions to these three issues: 1. Engine stalling when shifting gears: After starting the car, when shifting from P or N to other gears, the engine stalls, or while driving, the engine stalls when braking (without auto-start-stop function). This may be due to a damaged lock-up solenoid valve or a stuck/damaged lock-up control valve. If the engine stalls multiple times when shifting gears, check if the gear engagement impact is severe. If it is, call for roadside assistance. What could have been just a valve body replacement might turn into a major transmission overhaul. 2. Transmission lock-up: During normal driving, the engine revs high but the speed increases very slowly. When braking, the speed drops to a certain point and stops decreasing. Switching to manual mode reveals the transmission is stuck in one gear and cannot shift up or down, meaning the transmission is locked in a specific gear and no longer shifts. This could be due to incorrect input/output signals from the transmission or faulty components or wiring. This situation can easily put you in a dangerous environment, as driving in the city with uncontrollable speed or on the highway without being able to accelerate can lead to accidents. 3. Car not moving after engaging a gear: After starting the car and shifting to D or R, releasing the brake results in no movement—the car does not move forward. Manually shifting to 1st gear and releasing the clutch also does not make the car move. This could be caused by damage to the transmission input shaft or reverse clutch, or a damaged D/R brake. It could also be due to transmission fluid leakage or severe lack of transmission fluid.

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What are the symptoms of a faulty carburetor electronic choke?

The symptoms of a faulty carburetor electronic choke are that the engine can start normally when cold, but after warming up, there may be black smoke from the exhaust pipe, the engine may fail to start, and the vehicle may experience jerking while driving. Below are the specific functions of the electronic choke: 1. During winter or when starting a cold engine in the morning at low temperatures, it is necessary to increase the ratio of gasoline to air to obtain a richer air-fuel mixture, which facilitates smooth engine starting. Therefore, the carburetor is equipped with a starting enrichment device. 2. The motorcycle starting enrichment device mainly comes in two structural forms: the choke valve mechanism and the bypass starting enrichment fuel passage. The choke valve mechanism is a relatively simple mechanical device, generally used in standard motorcycles.

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What does cleanair mean in a car?

cleanair refers to air purification, which is a function in the car's air conditioning system. The following is an introduction to how cleanair achieves air purification: 1. Air conditioning filter with activated carbon. An additional activated carbon layer can adsorb more harmful substances on the filter, although the price of such a filter is several times higher than that of a regular one. 2. Negative ion air purification. High-voltage circuits generate plasma, which disrupts the protein membrane on the surface of bacteria, causing them to lose vitality and die, thereby eliminating bacteria in the air. 3. When the driver turns on the internal or external circulation, the cleanair function automatically activates. As an air purification function, it naturally filters harmful gases to ensure clean air inside the car.

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What maintenance items are required at 30,000 kilometers?

At 30,000 kilometers, the maintenance items for a car include changing the engine oil, oil filter, air filter, fuel filter, throttle cleaning, and a comprehensive inspection of the vehicle. Here are the detailed explanations: 1. For a 30,000-kilometer maintenance, changing the engine oil and oil filter is essential. Due to prolonged engine operation, the engine oil's performance deteriorates significantly under high temperature and pressure conditions, reducing its protective effect on the engine over time. 2. The oil filter prevents impurities generated by the engine from mixing into the oil, which can lead to the formation of sludge and clog the oil passages. Therefore, the oil filter should be replaced along with the engine oil. 3. The air filter should be replaced every 10,000 to 15,000 kilometers, and the fuel filter every 30,000 kilometers. Before reaching 30,000 kilometers, throttle cleaning is not necessary. However, at the 30,000-kilometer maintenance, throttle cleaning is required because carbon deposits can accumulate in the throttle, potentially causing unstable idling.

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How to reset the maintenance light on a Jeep Cherokee?

Turn the key to the ON position, then fully depress the accelerator pedal at least three times within 7 seconds. After that, turn off the ignition to complete the reset. Below is a detailed introduction to car maintenance: 1. Car maintenance refers to the preventive work of regularly inspecting, cleaning, replenishing, lubricating, adjusting, or replacing certain parts of the vehicle, also known as vehicle servicing. 2. Car maintenance mainly includes the engine system, transmission system, air conditioning system, cooling system, fuel system, power steering system, and other maintenance areas. 3. Some mid-to-high-end vehicles now come with a maintenance reminder function. Based on preset mileage or engine operating hours, a maintenance prompt will appear on the dashboard, sometimes accompanied by an alert sound. This prompt can be set via a diagnostic computer at a 4S shop or directly through the vehicle's onboard system. After maintenance, the prompt can be manually reset to start the next cycle. 4. If the owner performs maintenance before the preset cycle and the 4S shop fails to reset the prompt, the previous maintenance reminder will still appear when due. Another scenario occurs in high-end vehicles where the onboard system detects issues with the air filter or oil viscosity and triggers a prompt.

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What Causes Difficulty in Cold Engine Start?

There are many reasons for difficulty in cold engine start. It may be due to low temperatures of the coolant in the cooling system and the lubricating oil in the lubrication system, which can lead to difficulties in cold starting. Here are several common phenomena of cold start difficulties: 1. Not replacing spark plugs in time is a common factor. Cold starts require higher ignition energy, and after a certain mileage, the electrode gap of spark plugs will increase. If it exceeds the standard, the spark energy generated will be greatly weakened, making it impossible to normally ignite the mixed gas in the cylinder (commonly known as misfire), naturally making it difficult to start. 2. Ignition coil failure is also very common. The ignition coil is a transformer responsible for converting the vehicle's low-voltage current into high-voltage electricity, allowing the spark plug to have sufficient voltage to "generate sparks." Once the ignition coil fails, such as cracking and leaking electricity, it will cause insufficient or lacking spark plug ignition capability. Consequently, the mixed gas in this cylinder will not combust, leading to engine misfire, starting difficulties, and acceleration jitter. 3. Regularly check whether the throttle and idle valve are excessively carbon-deposited. Excessive carbon deposits can easily clog the idle air passage, leading to poor air intake. 4. Additionally, check whether the engine control system's water temperature sensor is working properly; because problems in these two aspects can cause difficulties in cold engine starts.

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What is required for vehicle inspection in Beijing?

What to Do When There Are Problems with the Car's Transmission?

What are the symptoms of a faulty carburetor electronic choke?

What does cleanair mean in a car?

What maintenance items are required at 30,000 kilometers?

How to reset the maintenance light on a Jeep Cherokee?

What Causes Difficulty in Cold Engine Start?

What to Do If Your Vehicle Fails the Annual Emission Test?

What is the normal RPM range for automatic transmission startup?

Is the highway toll-free during the Mid-Autumn Festival?

What Are the Reasons for Difficult Cold Starts?