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How to Distinguish Between Good and Bad Spark Plugs?

1 Answers

LeSteven

07/24/25 6:22am

Methods to determine the quality of spark plugs: 1. Spark Test: Remove the spark plug and test it on the cylinder block with a high-voltage wire. If there is no spark or the spark is weak, it indicates that the spark plug is leaking electricity or not working. 2. Color Observation: Remove the spark plug. If the surface appears reddish-brown or rust-colored, it indicates the spark plug is normal; if it is oily, it indicates a gap misalignment, excessive fuel supply, a short circuit in the high-voltage wire, or non-operation; if the spark plug is severely eroded, with phenomena such as blistering at the top, black streaks, cracks, or electrode melting, it means the spark plug is damaged and must be replaced immediately. Effects of a Bad Spark Plug: If the spark plug is damaged, it can directly cause issues such as leakage in the vehicle's ignition system, increased fuel consumption, and reduced power. The main problem is difficulty in ignition, affecting the normal use of the vehicle. Severe erosion of the spark plug, blistering at the top, damage, or melting and erosion of the electrode all indicate that the spark plug is ruined and should be replaced.

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Why Can't the Other Party Hear Sound on Car Phone?

There are multiple reasons why the other party cannot hear sound on a car phone. Here is a detailed explanation: 1. Reasons: The call volume on the phone is not turned on. You can try dialing a phone number and pressing the volume up button on the side of the phone during dialing or a call to increase the volume; The volume on the car navigation system is not turned on, simply turn it on; The car Bluetooth is not paired or connected to the phone at all. 2. Functions of Car Phone: The car phone has a voice-controlled hands-free function, avoiding the danger caused by using a mobile phone while driving. It has a DPS digital system that can filter out noise, making the voice clearer and preventing the driver's attention from declining, thereby avoiding the risk of collision. The antenna of the car phone is placed outside the car, and there is no electronic signal radiation inside the car. Since there is no electronic radiation signal inside the car, it will not interfere with the car's precision instruments, such as the ABS system and airbags.

How Often Should Freon Be Added to a Car?

Car air conditioning systems typically require freon replenishment every three to five years, though there is no strict time standard for adding freon. The methods for determining when to add freon and an introduction to freon are as follows: Determination Methods: If the air conditioning cooling performance is insufficient, it is likely due to a lack of freon. The most intuitive method is to observe the glass inspection port on the air conditioning pipes in the engine compartment. If the glass inspection port cannot be found, check for oil stains at the air conditioning system joints, as their presence may indicate a freon deficiency. Introduction to Freon: Freon, also known as Fluorocarbon, originates from the English term 'Freon,' a refrigerant trademark registered by DuPont in the United States. In China, the definition of freon varies. Generally, it refers to halogenated derivatives of saturated hydrocarbons (primarily methane, ethane, and propane). According to this definition, freon can be categorized into four types: CFC, HCFC, HFC, etc. Some scholars define freon as CFC refrigerant, while in some materials, freon specifically refers to dichlorodifluoromethane.

What Causes Noise When Turning a Car?

The reasons for noise when turning a car are: 1. Plastic sound from the steering wheel: Many car steering wheels are made of plastic, which can produce friction noise during turns. In cold weather, friction between plastic components becomes more frequent; 2. Aging of the tie rod end: The tie rod end of the steering system is a frequently used component during turns. Over time, aging tie rod ends can cause steering wheel vibration and noise; 3. Sound from the shock absorber top bearing: Identifying this sound is relatively simple - open the engine hood to check if the noise originates from the shock absorber top mount position; 4. Improper tension or aging of the power steering belt: For mechanical hydraulic power steering systems, improper belt tension or aging has significant impact. If the issue is belt tension, it can be adjusted. For aged belts, replacement is necessary.

Does the vehicle license have an expiration date?

The vehicle license does not have an expiration date. However, it requires annual inspection. The supplementary page indicates the validity period of the inspection, which is essentially the deadline for the annual inspection. Therefore, the validity of the vehicle license is also tied to the annual inspection. Vehicle license processing locations: Embassies/consulates and foreign-licensed vehicles should go to the vehicle management office. Other vehicles should go to the sub-office of the vehicle management office corresponding to the residential address recorded in the identity proof of the vehicle owner. For vehicles with a residential address in suburban districts or counties (such as Beijing B-licensed motorcycles, tricycles, low-speed trucks, and wheeled self-propelled machinery), the processing should be done at the local district/county vehicle management station. Documents required for processing: "Application Form for Replacement of Vehicle License Plates/Certificates," identity proof of the vehicle owner and agent, the original license plate if it is illegible or one side is lost, and for replacement of the vehicle license, a standard photo of the vehicle is also required.

What is the difference between tire pressure warning and display?

Tire pressure display and tire pressure warning differ in that the tire pressure display allows you to visually see the tire pressure, while the tire pressure warning is just an alert system that triggers an alarm when the tire pressure is too high or too low. Abnormal tire pressure can occur due to the following reasons: Abnormal tire pressure: Generally, an alarm will be triggered if the pressure is below 1.8 bar or above 3.0 bar. In this case, tire inspection and pressure adjustment are required. Tire pressure monitoring not reset: After inflating the tires, if the tire pressure monitoring system is not reset in time, it will continue to record the previous data, causing the tire pressure monitoring indicator to light up. Simply resetting the tire pressure will resolve this issue. Damaged tire pressure sensor: The tire pressure sensor, which is directly installed inside the tire and connected to the tire inflation valve, monitors the tire pressure. If the sensor is damaged during driving, it can also cause the tire pressure warning light to illuminate. For sensor damage issues, only a complete replacement with a new part is possible.

What to Do If a Mouse Enters the Car Engine Compartment?

First, remove any odors from the engine compartment. Mouse urine is not only pungent and unpleasant, but other mice may follow the scent and enter the engine compartment again. Next, consider spraying perfume or taking the car to a detailing shop for cleaning. Finally, change your parking location to avoid areas frequented by mice and regularly open the hood to inspect the engine and other components. Here are some effective tips to prevent mice from entering the engine: Parking: Park as far away as possible from areas where mice are commonly found, such as garbage piles, ditches, or grassy areas. Cleaning: Regularly inspect and clean the engine to check for signs of mouse activity and ensure the engine compartment remains clean. Inspection: Periodically check the car's front grille for any damage or detachment and address any issues promptly. Installation: Install an electronic rodent repellent in the engine compartment to use ultrasonic waves to deter mice. Placement: Placing rodent repellent bags or mothballs in hidden spots within the engine compartment can also be somewhat effective.

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