Will the noise increase if the car's three-way catalytic converter is removed?

1 Answers
DiEvelyn
07/30/25 8:26am
Removing the car's three-way catalytic converter will increase the noise because it leaves a large exhaust space, allowing exhaust gases to rapidly discharge into the atmosphere, which naturally amplifies the engine noise. Below is relevant information about the car's three-way catalytic converter: Appearance: The three-way catalytic converter looks like a metal can, but inside it contains a 'substrate' for purifying exhaust gases. This honeycomb-shaped ceramic substrate is coated with a precious metal slurry, primarily composed of platinum, rhodium, and palladium. Function: The precious metals act as purifying agents, reducing HC and CO in the exhaust gases into water and CO2, while decomposing NOx into nitrogen and oxygen. This is the exhaust purification function of the three-way catalytic converter.
Was this review help?
3
1
Share
More Forum Discussions

Which of the four colors of the BYD Han is the most beautiful?

BYD Han EV offers four color options: Snowfield White, Emperor Red, Time Gray, and Mysterious Black. Among them, Emperor Red is the most beautiful, as it is the main color promoted by the manufacturer. It's a common practice for manufacturers to choose the most appealing color as their main offering. Here is some relevant information: 1. Exterior: In terms of appearance, the BYD Han has upgraded its Dragon-Face family design, making it look more refined. The Han EV features a closed front grille design, giving the entire profile a sports car-like curvature. Although the front face incorporates a through-type chrome trim, its lines are more fluid, enhancing the overall sleekness at first glance. 2. Interior: The interior of the BYD Han adopts a red and black color scheme. The new design language is said to incorporate Chinese aesthetic concepts, featuring a symmetrical design. The Chinese red-themed seats, along with red accents on the center console, steering wheel, and door panels, provide a certain visual impact. The combination of the instrument panel and the 10.58-inch central control screen enhances the technological feel inside the car.
19
4
Share

What is the standard for vehicle scrapping due to water submersion?

Submerging up to the engine hood is enough to scrap the vehicle. Even if not scrapped, the repair cost could reach 80% of the vehicle's value. Insurance companies will cover water-damaged vehicle scrapping if you have commercial vehicle damage insurance. Another scenario is when repair costs exceed the insured value of the vehicle. Additional information on the impact of water submersion on vehicles: Interior mold: Most automotive interior materials are water-absorbent. Rainwater contains numerous impurities and bacteria, and the enclosed cabin space creates an environment conducive to mold growth. Engine damage: If water has entered the engine, forcibly starting the vehicle can cause severe connecting rod deformation. Transmission failure: Once water enters the transmission, the vehicle may experience slipping issues, potentially leading to transmission failure.
3
3
Share

Is Vehicle Water Damage Covered by Insurance?

Vehicle water damage is covered by insurance. Below is a detailed introduction to vehicle damage insurance coverage, which includes: vehicle damage insurance, third-party liability insurance, theft and robbery insurance, passenger seat liability insurance, standalone glass breakage insurance, spontaneous combustion insurance, scratch insurance, and compulsory traffic insurance. Coverage scope: The insured vehicle suffers from parallel falling while driving, storms, tornadoes, lightning strikes, hail disasters, heavy rain, floods, tsunamis, ground collapse, ice collapse, cliff collapse, avalanches, mudslides, and landslides. The insured vehicle is stolen, robbed, or hijacked, and during the period of theft, robbery, or hijacking, or due to attempted theft, robbery, or hijacking, the vehicle is damaged or parts and accessories are lost.
17
2
Share

What Causes a BMW to Fail to Detect the Key and Unable to Start?

Introduction to the reasons why a BMW cannot detect the key: 1. Poor placement of the key: For example, in the trunk, on the car floor, in the cup holder, in the glove compartment, on the storage box of the door trim panel, near the rear parcel shelf, or under the front windshield. If this issue occurs, try placing the key in a visible location inside the passenger compartment first. 2. Low battery in the key: The remote key typically uses a standard button battery with a rated working voltage of around 3.3V. Under normal circumstances, the battery life can generally last up to 2 years. 3. Use of a key case: This can cause weak or blocked signals. 4. Signal interference: Placing the key near devices such as mobile phones, laptops, or power adapters. Since radio devices like mobile phones, laptops, and power adapters emit wireless signals that can interfere with the smart key, keep the key away from these devices when in use. 5. Issues with the key chip: This can lead to poor signal transmission or no transmission at all.
4
4
Share

Is the Subject 1 Test Conducted on Computer or Paper?

According to the "Regulations on the Application and Use of Motor Vehicle Driving Licenses", the test is conducted on a computer with a time limit of 45 minutes. The test consists of 100 questions, divided into single-choice and true/false questions, with each question worth 1 point, totaling 100 points. If 11 questions are answered incorrectly during the test, the system will automatically submit the test and end the examination. Subject 1, also known as the theoretical test or driver's theory test, is part of the motor vehicle driving license assessment. The test content includes driving theory basics, road safety laws and regulations, local regulations, and related knowledge. Subject 1 Test Content: Driving license and motor vehicle management regulations; Road traffic conditions and regulations; Road traffic safety violations and penalties; Road traffic accident handling regulations; Basic knowledge of motor vehicles; Local regulations; Knowledge of braking systems and safety devices for large and medium-sized passenger and freight vehicles; Special knowledge for wheeled self-propelled machinery, trams, and trolleybuses. Subject 1 Test Notes: Candidates should pay attention to their attire during the test—no slippers are allowed, and electronic devices and bags are prohibited in the examination room. Bring your ID card and queue to enter the waiting hall. Observe the precautions and procedures on the large screen, and store personal belongings in the lockers before entering the examination room. In the examination room, seats are assigned at the identity verification point. After finding your seat, begin the test. Ensure the camera is aligned with you and adhere to test discipline. If you fail the first attempt, a retake is available on the same day. If you fail again, you must pay to reschedule. After completion, queue to collect your score report and sign it. Without a signature, the result is invalid. There is no limit to the number of times you can schedule the Subject 1 test. Each subject can be taken once, with one retake allowed if you fail. If you do not take the retake or fail the retake, the test is terminated, and you must reschedule. In contrast, Subject 2 and Subject 3 have only five attempts each. Subject 2 and Subject 3 tests can be rescheduled after ten days. If you fail the Subject 3 safe and civilized driving knowledge test, the previously passed road driving skills test results remain valid. The driving test consists of three subjects: Subject 1, Subject 2, and Subject 3. Subject 1 refers to the road traffic safety laws, regulations, and related knowledge test; Subject 2 refers to the field driving skills test; Subject 3 is divided into two parts: road driving skills and safe and civilized driving knowledge test.
14
5
Share

What Causes Weak Throttle Response After Vehicle Wading?

Due to water ingress causing damage to sensors or electronic control mechanisms around the engine. Below is relevant information about the throttle: Introduction: The throttle, also known as the "air valve" or "throttle valve," refers to the control device that regulates engine power. In piston aircraft engines, the throttle controls the carburetor's throttle valve opening to regulate cylinder filling volume, thereby determining engine output power. Causes and Solutions for Throttle Abnormal Noises: Carbon buildup in the throttle causing sticking requires throttle cleaning; wear of the throttle pedal support pin can be resolved by applying grease; poor installation of throttle cable (for electronic throttles, inspect the throttle pedal mechanism and throttle pedal sensor).
3
4
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.