Where is the BMW CAS module located?

Where Does the Carbon Deposits Cleaned by Fuel Additives Go?

Fuel additives ultimately remove carbon deposits through combustion and emission into the air. More extended information is as follows:1. Hazards: Fuel additives clean carbon deposits by burning and releasing them into the air. Due to various reasons, the quality of domestic refined oil has always been relatively poor, with low octane ratings in gasoline. To increase the octane rating, it is necessary to increase the content of aromatics and olefins, which unavoidably leads to higher emissions and significantly increases engine carbon deposits. The use of fuel additives can, to some extent, mitigate the harm caused by this issue.2. Effects: Fuel additives can indeed provide certain benefits for vehicles, essentially serving as a 'supplement' for daily car maintenance. On one hand, their use can promote energy conservation and environmental protection, while on the other hand, they can also help clean carbon deposits to some extent, keeping the engine lively. However, it is crucial to choose carefully and avoid purchasing or using inappropriate or even substandard fuel additives simply because they are cheap.

2

1

Share

What causes crankshaft pulley noise?

Crankshaft pulley noise is due to excessive axial clearance. Axial: Excessive axial clearance can cause the car to jerk forward and backward when starting, sometimes accompanied by metal impact sounds; Diagnosis: Use a pry bar to move the crankshaft pulley under the car to check for clearance; Cause: Worn-out crankshaft thrust washers require replacement. Radial: Metal impact sounds may be heard during acceleration or deceleration, accompanied by engine vibration. Diagnosis: Use a stethoscope (automotive repair stethoscope or a 2-3 foot long copper pipe/iron rod) to listen. If the above symptoms occur in the lower part of the engine, proceed with further inspection by draining some engine oil to check for metal shavings. If present, there's a 90% chance the noise is caused by excessive crankshaft bearing clearance. If conditions permit, removing the oil pan will provide a more accurate diagnosis.

2

0

Share

Do You Need to Press the Brake When Starting a Car?

Starting a car requires pressing the brake. Here are the relevant details: Necessity of Pressing the Brake When Starting: This is a standard safety practice in driving, particularly for manual transmission vehicles. It prevents the car from lurching forward if the gear is not in neutral before starting, which could lead to accidents. Steps for Starting a Car: Turn the ignition key to the ON position and wait for 5 to 8 seconds before turning it to the start position to ignite the engine. Once the engine starts smoothly, immediately release the ignition key, allowing it to return automatically to the ON position. If the engine fails to start smoothly, avoid continuously cranking the starter for more than 5 seconds. Wait at least 15 seconds before attempting to start again to protect the battery and starter. If the engine does not start after three consecutive attempts, there may be an engine issue, and further attempts will likely be ineffective.

15

1

Share

Why does the brake suddenly become hard and difficult to press while driving?

When the brake suddenly becomes hard and difficult to press while driving, it is usually related to a vacuum booster pump failure. Here are the reasons and solutions for a hard brake: 1. Vacuum booster pump air leakage: Under normal driving conditions, the negative pressure in the intake manifold absorbs air from the vacuum booster pump, keeping it in a charged state. If the brake becomes hard on the first press, it indicates air leakage in the vacuum booster pump. Solution: Replace the vacuum hose. 2. Speed too low, gear too high: Under normal driving conditions, the negative pressure in the intake manifold absorbs air from the vacuum booster pump, keeping it in a charged state. If the brake becomes hard after pressing it once, it may be due to insufficient intake negative pressure caused by low speed and high gear. Solution: Increase speed. 3. Leakage in the connecting hose: A leaking hose can lead to insufficient vacuum, causing the brake to lose its boosting effect and become hard. Solution: Check the vacuum hose to ensure it is properly sealed and restore normal operation.

10

2

Share

What to do if the car AC switch light is not on?

AC switch is damaged. More information about the car AC switch is as follows: 1. Overview: The car AC switch is simply the cooling switch of the air conditioner. AC stands for "Air conditioning", which means air conditioning device. This button controls the opening and closing of the compressor, and the car air conditioner can cool down by the operation of the compressor. 2. Others: After the car air conditioner is turned on, the air conditioner will blow air because the blower in the air conditioning system starts to work at this time, so there is wind blowing out, but the air conditioning cooling system has not started yet because the air conditioning compressor has not started to work. After the AC switch is turned on, the car computer receives the signal from the AC switch, and then the car computer will send a signal to the air conditioning compressor. The air conditioning compressor starts to work after receiving the instruction, and the cooling of the car air conditioner starts to work at this time.

2

Share

What is the difference between 6AT and CVT transmissions?

AT transmissions have excellent load-bearing capacity but are not as smooth as CVTs and are more costly; CVTs offer superior smoothness and lower costs but have limited load-bearing capacity. The specific details are as follows: 1. 6AT Transmission: The torque-bearing capacity of a 6AT transmission is very strong, which is why off-road vehicles use AT transmissions—even heavy loads pose no problem for AT transmissions. The previous notion that AT transmissions are not fuel-efficient can almost be dismissed, as modern AT transmissions are highly advanced. However, the smoothness of AT transmissions still cannot compare to CVTs, and they are more expensive. 2. CVT Transmission: CVT transmissions provide excellent fuel economy, unmatched driving smoothness, effectively reduce emissions, and are cost-effective. However, when subjected to excessive loads, they are prone to slipping, and extreme loads may even cause the steel belt to break. For typical family cars, the load is usually not enough to reach the breaking point.

6

4

Share

Where is the BMW CAS module located?

Where Does the Carbon Deposits Cleaned by Fuel Additives Go?

What causes crankshaft pulley noise?

Do You Need to Press the Brake When Starting a Car?

Why does the brake suddenly become hard and difficult to press while driving?

What to do if the car AC switch light is not on?

What is the difference between 6AT and CVT transmissions?

What are the reasons for both high and low beams of car headlights not working?

How Long Can a 12V to 220V Battery Converter Last?

What are the disadvantages of hybrid vehicles?

What to Do If the Driver's License Renewal is Delayed?