What Causes a Car to Fail to Start After Stalling?

How many points are deducted for driving against traffic in a tunnel?

Driving against traffic in a tunnel results in a deduction of 6 points. Point deduction standards for driving against traffic: Driving against traffic on urban and other ordinary roads (non-motorized lanes, one-way streets) will result in a deduction of 3 points; driving against traffic on highways (ramps, toll booth exits) will result in a deduction of 12 points and may lead to the suspension of the driver's license. Circumstances considered as driving against traffic: On roads with solid dividing lines (double solid lines, single solid lines), vehicles must not cross the line under any circumstances. If a motor vehicle enters the opposite lane, it is considered driving against traffic; on roads with dashed dividing lines, vehicles may borrow the opposite lane to overtake if it is safe to do so, but if an accident occurs, the vehicle borrowing the lane will be deemed to be driving against traffic; on roads marked as one-way streets, any motor vehicle entering is considered to be driving against traffic.

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Is It Normal to Find Black Debris After Changing to Shell Engine Oil?

Finding black debris after changing to Shell engine oil is a normal phenomenon. The black substances in the oil are carbon deposits and oxidation byproducts from inside the engine. Therefore, no matter how clear the oil is initially, it will turn black after working in the engine for some time, which indicates the oil is performing its cleaning function. Engine oil has a cleaning effect: Engine lubricating oil carries away dirt and debris from friction surfaces, delivering them to the oil pan. When passing through the oil filter, these contaminants are trapped, while the clean oil continues its washing action. This cyclic process helps keep engine components clean and functioning normally. Characteristics of engine oil: Engine oil possesses lubricating properties, low-temperature operability, viscosity-temperature characteristics, oxidation resistance, and foam resistance.

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Does the Jetta VS7 Require 95 Octane Gasoline?

According to the official vehicle manual recommendation, the Jetta VS7 should use 95 octane gasoline. In addition to checking the appropriate gasoline grade in the vehicle manual, you can also find it marked on the fuel tank cap of the Jetta VS7. Typically, the gasoline grade can also be determined based on the engine's compression ratio. Vehicles with an engine compression ratio between 8.6-9.9 should use 92 octane gasoline, while those with a compression ratio between 10.0-11.5 should use 95 octane gasoline. However, with the application of new technologies, the gasoline grade cannot be solely determined by the compression ratio. High compression ratio engines can also be tuned to use lower octane gasoline because, apart from the compression ratio, other factors such as ignition timing, turbocharging technology, and Atkinson cycle technology also play a role. Generally, the higher the gasoline octane number, the higher the octane value and the better the anti-knock performance. 92 octane gasoline contains 92% isooctane and 8% n-heptane, while 95 octane gasoline contains 95% isooctane and 5% n-heptane. If the Jetta VS7 occasionally uses the wrong gasoline grade, simply switch back to the correct grade after consumption. However, long-term use of the wrong gasoline grade can have the following effects: For vehicles recommended to use lower octane gasoline, mistakenly using higher octane gasoline will not cause damage, but the increase in octane value will alter the fuel's ignition point, leading to delayed combustion in the engine. This means both the engine's power output and thermal efficiency will decrease, resulting in poorer performance. For vehicles recommended to use higher octane gasoline, using lower octane gasoline can cause engine knocking. Due to the significantly lower octane value, the gasoline's ignition point decreases, causing premature ignition during the compression stroke. If combustion occurs before the spark plug ignites during the compression stroke, resistance will arise during the upward stroke. This resistance makes the engine run very unstably. If the knocking is imperceptible, it only increases noise without obvious damage to the engine. However, noticeable knocking indicates severe engine conditions, affecting not only driving stability but also causing abnormal wear on pistons and cylinders, and in severe cases, cylinder scoring.

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Can an electronic pump be installed in addition to a manual fuel pump?

Theoretically, an electronic pump can be installed in addition to a manual fuel pump. Manual fuel pump: A manual fuel pump is a device that pumps fuel from the fuel tank into the fuel line. When there is air in the fuel line of a diesel engine, such as in a newly manufactured vehicle or when the fuel in the tank is completely exhausted, the engine cannot start because the diesel fuel pump only operates when the engine is running. In such cases, a manual fuel pump is used to pump fuel from the tank into the fuel line. Electronic pump: An electronic pump uses piezoelectric materials as the power device, achieving complete electronic control from operation to drive. It fully controls liquid transmission through an electronic integrated system, thereby achieving adjustability and precision in liquid transmission, making it a new type of pump.

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Is the initial license issuance date the same as the date of passing Subject 4?

The initial license issuance date is the date of passing Subject 4. Here are the relevant details: Initial license issuance date: The initial license issuance date is indicated on the front of the driver's license. The vehicle management office does not charge any fees for submitting the medical examination form. For other types of licenses, as long as traffic regulations are followed and the traffic violation points do not exceed 12 points in each scoring cycle. Annual review regulations: If there are point deductions on the driver's license, an annual review is required. If there are no point deductions during the validity period, the review will be conducted within 90 days before the license expires when applying for renewal. According to Article 72 of the "Regulations on the Application and Use of Motor Vehicle Driver's Licenses," motor vehicle drivers must undergo regular reviews at the traffic management department of the public security authority in accordance with laws and administrative regulations.

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What Size is Considered a B-Class Car?

B-class cars typically have a length of 4400mm-4850mm and a wheelbase of 2650mm-2800mm. Car Classification: Regarding car classification, standards vary by country. The division of cars into A00, A0, A, B, C, and D classes is a classification method used by the German automotive industry (due to its strong automotive sector, hence the clear demarcation), and it is not a universally accepted standard. There are no strict rules between the classes, and this classification is mainly based on parameters such as wheelbase, engine displacement, and weight. C-Class Cars: C-class cars are high-end sedans. Generally, C-class cars have a wheelbase of approximately 2800mm to 3000mm, a body length of 4800mm to 5000mm, and an engine displacement exceeding 2.4L. Typical examples of large and mid-size cars in this category include the Audi A6L, Mercedes-Benz E-Class, and Toyota Crown.

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What Causes a Car to Fail to Start After Stalling?

How many points are deducted for driving against traffic in a tunnel?

Is It Normal to Find Black Debris After Changing to Shell Engine Oil?

Does the Jetta VS7 Require 95 Octane Gasoline?

Can an electronic pump be installed in addition to a manual fuel pump?

Is the initial license issuance date the same as the date of passing Subject 4?

What Size is Considered a B-Class Car?

What does engine CNG mean?

What is the working principle of the Dual Hybrid system?

What brand is the little golden man?

How Many Times Is a New Vehicle Exempt from Inspection?