What is the difference between 30 and 40 engine oil viscosity?

Where is the production date located on a Fengfan battery?

Fengfan battery production date is located on the surface of the battery. Below are specific details about Fengfan battery production dates: Purpose of production date: The production date of a car battery, although not unique, plays a decisive role in checking the aging degree of the battery. Production date coding method: The production date of Fengfan batteries consists of a series of Arabic numerals and English letters. For example, a Fengfan battery labeled as 4A0735331 indicates that '4' represents production in 2014, 'A' stands for January, '07' represents the 7th day of the month, and '35331' refers to the production unit code and team number.

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What to Do When One Fuel Injector is Faulty?

If a fuel injector is faulty, it should be disassembled for repair. If the damage is severe, it should be replaced. After replacement, the fuel injection pressure should be adjusted to 22-0.5Pa, ensuring good spray performance without dripping. Symptoms of a faulty engine fuel injector include the following: 1. Black smoke from the exhaust pipe. 2. Uneven operation of each cylinder, causing noticeable engine vibration. 3. Decreased engine power. 4. Weak vehicle performance. 5. To diagnose a faulty engine injector, let the engine idle and perform a fuel cut-off test on each cylinder sequentially.

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What is the function of the EGR valve?

The function of the Exhaust Gas Recirculation (EGR) system is to reduce the emission of nitrogen oxides (NOX) in the exhaust. When the engine is operating under load, the EGR valve opens, allowing a small amount of exhaust gas to enter the intake manifold and mix with the combustible mixture before entering the combustion chamber. During idle, the EGR valve closes, and almost no exhaust gas is recirculated back into the engine. The EGR system primarily works through the following principles: 1. The CO2 and water vapor in the EGR significantly increase the specific heat capacity of the working medium. 2. The addition of exhaust gas also dilutes the oxygen concentration in the original mixture, slowing down the combustion speed. 3. It reduces both the peak and average temperatures during combustion, disrupting the favorable conditions for NO formation, thereby greatly reducing NOX emissions.

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How to Turn on Car Lights at Night?

There are 4 situations for turning on car lights at night as introduced below: 1. No special circumstances: When driving at night, just turn on the low beam, and be sure to use the turn signal when turning. Urban roads are well-lit, so there is no need to use the high beam. However, if you encounter a completely dark road ahead with poor lighting, you should turn on the high beam because the high beam is positioned higher than the low beam, allowing it to illuminate distant and high objects. 2. When meeting another vehicle: If you were using the low beam before, no adjustment is needed. If you were using the high beam, you should switch to the low beam in advance. Otherwise, the high beam will make it difficult for the oncoming vehicle to judge the width of your car, which could easily cause an accident. After passing the oncoming vehicle, decide whether to switch back to the high beam based on road conditions. 3. When driving straight through an intersection: You should use the low beam. There is also a suggestion to alternately use the high and low beams to signal, but according to regulations, when approaching an uncontrolled intersection, you should slow down and alternately use the high and low beams to signal. 4. When overtaking: You should turn on the turn signal in advance, then honk and quickly switch between the high and low beams to alert the vehicle ahead. After confirming that the vehicle ahead has no intention of changing lanes, quickly overtake. Do not drive side by side with the other vehicle for too long. After completing the overtaking and maintaining a safe distance from the overtaken vehicle, use the turn signal to move back to the original lane.

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What is the Difference Between Parking Lights and Brake Lights?

Parking lights and brake lights differ in that brake lights are brighter than parking lights, parking lights consume relatively less power, and parking lights can only be turned on when the vehicle is turned off. Below are the relevant details: Brake Lights: Parking lights and brake lights do not use the same bulb. Brake lights have a larger surface area and stronger light penetration, similar to fog lights. Parking Lights: Parking lights and position lights use the same bulb, while parking lights are turned on only when the vehicle is parked, and position lights are turned on while driving. Parking lights are activated via the turn signal lever and can be turned on by moving the lever after the vehicle is turned off.

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Does a Car Air Conditioner Need Freon?

Car air conditioners do require Freon. Below are specific details about Freon: Methods for Adding Freon to a Car Air Conditioner: There are two methods for adding Freon to a car air conditioner. One is high-pressure side charging, which is suitable after leak detection and vacuuming. Note that this method must not involve turning on the compressor, the engine must be off, and the refrigerant tank must be inverted. The other method is low-pressure side charging, where gas is added. This method is characterized by slow charging speed and is typically used for supplementing refrigerant. Introduction to Freon: Freon can be considered synonymous with refrigerant. Due to its extensive use and severe damage to the ozone layer, countries worldwide have begun implementing a complete ban on its use. Although policies prohibiting Freon have been introduced, products currently using Freon will not be immediately halted but will be phased out gradually.

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What is the difference between 30 and 40 engine oil viscosity?

Where is the production date located on a Fengfan battery?

What to Do When One Fuel Injector is Faulty?

What is the function of the EGR valve?

How to Turn on Car Lights at Night?

What is the Difference Between Parking Lights and Brake Lights?

Does a Car Air Conditioner Need Freon?

How to Turn Off the Air Conditioning in a Buick Excelle?

Should High Beams Be Used on Highways?

Why Are Used Landwind X8 Cars So Cheap?

How to Remove Fog from the Car on Rainy Days?