How long does it take for the fuel pump pressure to completely release?

How to Solve Abnormal Noise from Car Exhaust Pipe?

The causes and solutions for abnormal noise from car exhaust pipe are as follows: 1. Damaged exhaust pipe: The engine exhaust emits high-temperature and high-pressure waste gas, along with some backfire explosions. In this case, the exhaust pipe needs to be replaced immediately. 2. Engine misfire: The reason why car engines are not as loud as motorcycle engines is that the exhaust processes of each cylinder in a multi-cylinder engine (most car engines are four-cylinder) are interconnected. If one cylinder stops working, the exhaust sequence will be disrupted, causing abnormal noise from the exhaust pipe. In this case, only professional repair personnel can fix the issue.

16

2

Share

What are the differences between the imported Kymco 400 and the domestic 400?

The differences between the imported Kymco 400 and the domestic 400 are as follows: 1. Transmission system differences: The transmission system of the imported Kymco 400 is significantly better than that of the domestic Xciting 400. The imported transmission system has less vibration, more linear acceleration, and much less noticeable low-speed vibration compared to the domestic version. Its vibration suppression is excellent, comparable to Japanese scooters. The domestic 400 vibrates particularly noticeably below 20-30 km/h and requires frequent cleaning of the transmission system; otherwise, the vibration becomes too pronounced. 2. Comfort differences: The imported Kymco 400 is better designed in terms of ergonomics, with superior materials, comfort, and handling compared to the domestic 400. The domestic 400 falls short in comfort when compared to the imported Kymco 400. 3. Price difference: The imported Kymco 400 is slightly more expensive.

3

4

Share

What is the reason for the urea tank not making noise after parking?

When there is no noise after parking, it indicates a malfunction in the urea pump. The urea pump continues to operate after the engine is turned off to return the unused urea in the pipes back to the urea tank. Otherwise, the urea in the pipes may crystallize, affecting normal use during the next operation. Therefore, the urea pump continues to work for a while after the vehicle is turned off before stopping automatically. Below is an introduction to the urea pump: 1. Working principle and internal composition of the urea pump The urea pump is the core component of the SCR system, known as the "urea dosing pump." Its main function is to pump the urea solution from the urea tank and transport it to the nozzle through the delivery pipe. 2. Working principle of the urea pump The internal composition of the urea pump mainly consists of a diaphragm pump, electromagnetic reversing valve, pressure sensor, urea filter, electric heating system, lead frame, and other components. The exterior is composed of three urea solution pipelines: the spray pipe, return pipe, and inlet pipe. 3. Internal composition of the urea pump There are two types of urea pumps: one is the airless urea pump represented by Bosch, and the other is the air-assisted urea pump represented by Emitec and Cummins.

15

1

Share

What is the appropriate wattage and lumens for LED car lights?

For car LED lights, a 35W model typically produces 3200 lumens, which is 91 lumens per watt. Generally, 80-100 lumens per watt is considered most suitable, but the specific choice should be based on the original vehicle's lighting power and individual brightness requirements. Theoretically, higher wattage in LED car lights means greater power and brighter illumination. However, in practice, higher wattage is not always better. Increased wattage leads to higher power consumption and operating temperatures, which demands more effective heat dissipation. Here are some key points about LED car lights: 1. The operating temperature of the LED chip must be kept below 85°C to ensure a lifespan of over 30,000 hours. If the LED wattage is too high, the increased power will raise the operating temperature. Exceeding 85°C will shorten the lifespan of the LED light as temperatures rise. 2. Since car electrical circuits have a rated power capacity, using LED lights with excessively high wattage that exceeds the circuit's load capacity can cause the wiring to overheat and potentially burn out. In terms of luminous efficiency, LED headlights of the same wattage are brighter than the original halogen bulbs.

14

0

Share

What is the Difference Between Traditional Wiper Blades and Beam Wiper Blades?

The differences between traditional wiper blades and beam wiper blades are: 1. Different principles: Traditional wiper blades press the rubber blade against the glass through multiple support points on the frame, ensuring even force distribution; Beam wiper blades directly apply force to the steel strip, effectively dispersing the concentrated force and maintaining uniform pressure on the rubber blade. 2. Different force distribution methods: Traditional wiper blades transmit pressure through layered strips; Beam wiper blades distribute force across the entire rubber blade. A wiper is a blade structure installed in front of the windshield, consisting of a motor, reducer, four-bar linkage mechanism, wiper arm spindle, and wiper blade.

8

4

Share

What is the fuel tank capacity of the A6?

Audi A6 has a fuel tank capacity of 73 liters, which is the officially announced data. The fuel grade for Audi A6 is 95, with a fuel consumption of 7.5-8.9L per 100 kilometers. A full tank can cover a distance of 820 to 973 kilometers. During daily driving, it is necessary to always pay attention to the remaining fuel in the tank. Generally, the fuel level is observed through the fuel gauge in the car. If there are no other issues, the fuel level will be accurately reflected on the gauge. The fuel gauge typically has 5 to 6 segments, and it is advisable to refuel when there are only 2 segments left to avoid running out of fuel midway. During the actual refueling process, the amount of fuel may exceed the calibrated capacity. This is because the fuel tank capacity specified by the car manufacturer is measured from the bottom of the tank to the safe limit, and there is still some space from the safe limit to the tank opening. This space is designed to allow for fuel expansion when the temperature rises, preventing overflow. If the fuel is filled up to the tank opening during refueling, the actual amount of fuel added may exceed the calibrated tank capacity.

12

1

Share

How long does it take for the fuel pump pressure to completely release?

How to Solve Abnormal Noise from Car Exhaust Pipe?

What are the differences between the imported Kymco 400 and the domestic 400?

What is the reason for the urea tank not making noise after parking?

What is the appropriate wattage and lumens for LED car lights?

What is the Difference Between Traditional Wiper Blades and Beam Wiper Blades?

What is the fuel tank capacity of the A6?

How to Adjust the Car Idle Speed a Bit Higher?

What is the correct procedure for starting a car?

Is it acceptable not to display the 2020 inspection compliance sticker?

How many kilometers can a car drive when the fuel tank warning light is on?