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What Causes a Car Not to Start in Cold Weather?

1 Answers
OliviaRose
07/30/25 4:08am
There are several reasons why a car may not start in cold weather: 1. Battery issues: Low temperatures in winter reduce battery power, often leading to starting difficulties; 2. Carbon buildup: Excessive carbon deposits are a major cause of starting failure, as spark plug carbon buildup affects ignition; 3. Starter problems: An aging starter or poor contact can prevent the car from starting. The correct car starting method: Insert the key and turn it to ACC position, wait 2-3 seconds to allow the main power relay contacts to stabilize; then turn the key to ON position and wait another 6-10 seconds for the fuel pump relay to engage.
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More Forum Discussions

Can Hong Kong Vehicles Drive into Mainland China?

Hong Kong vehicles can drive into mainland China after obtaining a license plate for travel between Hong Kong and the mainland. The license plate number consists of 7 digits: the first digit represents the abbreviation of the province or municipality, the second digit represents the abbreviation of the provincial-level city, and the third to seventh digits are a combination of numbers and letters. Function of License Plates: License plates, commonly known as vehicle plates, refer to the plates hung on the front and rear of a vehicle. They are typically made of aluminum, sheet iron, plastic, or paper, and display the vehicle's registration number, registration region, or other relevant information. License plates serve to number and register vehicles, with the primary purpose of identifying the vehicle's region of registration and allowing for the retrieval of the vehicle's owner and registration details. Types of License Plates: White plates represent military and police vehicles; blue plates represent ordinary small vehicles with fewer than 7 seats; yellow plates represent ordinary large vehicles; black plates represent foreign investors in China.
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What are the causes of engine pre-ignition?

Engine pre-ignition can be caused by carbon deposits, oil entering the combustion chamber, etc. Formation of hot spots in the combustion chamber: Hot spot theory suggests that design flaws or carbon deposits can create high-temperature spots in the combustion chamber. During high-load operation, these spots may exceed the ignition temperature, igniting the air-fuel mixture without spark plug activation, leading to excessive pressure buildup. Evidence supporting this theory includes the fact that engines are more prone to pre-ignition after prolonged use. Splashing of oil-fuel mixture into the combustion chamber: During piston movement, droplets of oil-fuel mixture may splash into the combustion chamber. These mixtures have a lower ignition point, forming pre-ignition nuclei that can ignite the entire combustion chamber. For example, in GDI engines, side-mounted fuel injectors facing the cylinder wall are more prone to pre-ignition than top-mounted injectors facing the piston.
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How Long Is the Driver's License Application Valid?

Before passing the written test (Subject 1), there is no expiration period for driver's license learning, and it will not become invalid. Below is the relevant information: Learning Driving Permit: After passing the Subject 1 test, the vehicle management office will issue a Learning Driving Permit within one day. The Learning Driving Permit is valid for three years, and applicants must complete Subject 2 and Subject 3 tests within this validity period. If the tests are not completed within the validity period, the passed test subjects will be voided. Validity Period: Within the validity period of the Learning Driving Permit, the number of scheduled tests for Subject 2 and Subject 3 road driving skills tests cannot exceed five times. If the fifth scheduled test is still failed, the results of other previously passed subjects will be voided.
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How long can a vehicle be overdue for its annual inspection?

Vehicle inspection can be delayed for up to 1 month after the due date. Below are the relevant details: Vehicle annual inspection regulations: The annual inspection must be conducted within the specified time frame, and the inspection can be scheduled up to 3 months in advance or delayed by 1 month. If the inspection is delayed by 2 months, the driver will be penalized. For any traffic accidents caused by failure to undergo the annual inspection on time, the involved party will bear full or primary responsibility, and the insurance company will not be liable. Vehicle inspection schedule: Passenger vehicles for commercial use must be inspected annually within the first 5 years; after 5 years, every 6 months. Trucks and large or medium-sized non-commercial passenger vehicles must be inspected annually within the first 10 years; after 10 years, every 6 months. Small and micro non-commercial passenger vehicles must be inspected every 2 years within the first 6 years; after 6 years, annually; after 15 years, every 6 months.
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Can You Turn Right Using the Non-Motorized Vehicle Lane?

Turning right cannot be done using the non-motorized vehicle lane. For motor vehicles turning right, entering the non-motorized vehicle lane constitutes a traffic violation. When making a right turn at an intersection, motor vehicles should not enter the non-motorized vehicle lane but must follow the designated lanes. Relevant details are as follows: Special circumstances: If a car is parked in a designated parking space within the non-motorized vehicle lane and there is a small intersection from the parking space to the crossroad without entering the motor vehicle lane, turning right, left, or going straight from the non-motorized vehicle lane is not considered a violation but a normal lane borrowing. However, after entering the intersection, the vehicle must merge into the motor vehicle lane. Relevant traffic regulations: Motor vehicles traveling on the motor vehicle lane, with the non-motorized vehicle lane separating them from the destination, may turn right into the non-motorized vehicle lane at the nearest small intersection to the destination and proceed by borrowing the lane until reaching the destination. If the non-motorized vehicle lane has designated parking spaces, parking is allowed. When leaving the destination, the vehicle must merge back into the motor vehicle lane at the nearest downstream intersection.
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What Needs to Be Replaced During Motorcycle Break-in Maintenance?

Motorcycle break-in maintenance is primarily centered around changing the engine oil. When replacing the engine oil, besides considering the time since the last change, it's also important to adjust the replacement interval based on usage frequency. Engine Oil Change: For most motorcycles, during the break-in period of a new bike, the first oil change is typically required at 500-1000 kilometers, followed by subsequent changes every 2000 kilometers. The brand of engine oil isn't critically important as long as it's genuine and not counterfeit or substandard. For genuine engine oils with similar prices, their quality is generally comparable. Post-Break-in Maintenance: Maintenance after the break-in period is relatively straightforward. If switching to fully synthetic oil, you can directly replace the old oil after draining it completely—no need to clean the engine. After the break-in period, a comprehensive inspection of the bike's overall condition is advisable. Apart from changing the engine oil, other maintenance tasks are quite simple, such as adjusting chain tension, checking brake and clutch free play, etc.
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