What are the symptoms of a faulty car EGR valve?

1 Answers
McMatteo
07/30/25 7:34am
EGR valve failure can cause engine shaking or even stalling during idle. Details are as follows: 1. When the EGR valve is damaged, it cannot control the exhaust gas recirculation volume. Excessive exhaust gas participating in recirculation will affect the air-fuel mixture concentration, potentially causing difficulties in starting, engine shaking, unstable idle, poor acceleration, and other phenomena that impact engine performance. 2. The EGR valve serves the function of oil-gas separation. When functioning normally, it only draws in exhaust gases without sucking in oil. If the EGR valve is damaged, it loses this oil-gas separation capability, potentially drawing in oil along with the gases, allowing oil to enter the combustion chamber, resulting in oil burning and blue smoke emissions.
Was this review help?
12
0
Share
More Forum Discussions

How to Perfectly Solve the Issue of Front-High and Rear-Low Seats?

Ordinary seats can generally be resolved by spending some time carefully adjusting them. Here is the relevant information: 1. Fixed racing-style seats (bucket seats): It is recommended to purchase a lumbar cushion. Car seats can be categorized by shape into split seats and bench seats; by function, they can be divided into fixed, removable, and adjustable types. 2. Advantages of leather seats: Easy to clean. Compared to fabric-covered seats, dust only settles on the surface of leather seats and does not penetrate deep into the seat, so a simple wipe with a cloth can clean them. For suede seats, seat covers must be purchased; otherwise, once dirty, stains may seep into the seat's interior. Better heat dissipation. Although leather also absorbs heat, it performs better in dissipating heat.
20
4
Share

Is the Mercedes-Benz G500 compliant with China VI emission standards?

Some models of the Mercedes-Benz G500 comply with China VI emission standards. China VI Emission Standards: The China VI emission standard, also known as the National Sixth Stage Emission Standard for Motor Vehicles, is an upgrade from the China V standard. It requires a reduction of more than 50% in carbon monoxide emissions and total hydrocarbons compared to the previous standard. The China VI standard is planned to be implemented in two phases: 6A and 6B. The first phase started on July 1, 2020, and the second phase will begin on July 1, 2023. Introduction to the Mercedes-Benz G500: The Mercedes-Benz G500 is a model released by Mercedes-Benz. In the autumn of 2010, an ultra-luxury SUV—the Mercedes-Benz G-Class—was launched in the United States.
1
0
Share

What does a motorcycle fender mean?

Motorcycle fenders are plate-like structures installed behind the outer frame of the wheels, typically made of high-quality rubber materials, with some using engineering plastics. The fender protrudes about 5cm from the body, effectively preventing flying stones and gravel from damaging the vehicle's paint. A motorcycle consists of five main components: the engine, transmission system, running gear, braking system, and electrical instrumentation equipment. Motorcycles are gasoline-powered vehicles steered by handlebars that control the front wheel, featuring two or three wheels for lightweight, agile movement and rapid travel. They are widely used for patrols, passenger and cargo transport, and also serve as sports equipment. Broadly speaking, motorcycles are categorized into street bikes, road racing motorcycles, off-road motorcycles, cruisers, and touring bikes.
1
3
Share

What Causes Water Leakage in Car Air Conditioning?

The reasons for water leakage in car air conditioning are as follows: 1. Improper installation of the unit: The indoor unit is tilted, or the pipe opening direction is too high. 2. Poor drainage pipe: The drainage pipe is loose or bent into a wave shape, causing poor drainage. 3. Condensation on the piping: Due to poor or too thin insulation material on the piping, condensation occurs when the refrigerant passes through the pipe. 4. Heat exchanger dripping: (1) The heat exchanger is covered with dust, causing uneven temperature distribution in the heat exchanger, leading to water droplets forming midway and dripping outside the water collection pan into the interior. (2) Insufficient refrigerant in the air conditioning system causes indoor freezing, and the water formed by melting ice does not directly drip into the water collection pan.
14
5
Share

At how many kilometers should the secondary maintenance of a car be performed?

Secondary maintenance is a maintenance operation centered on inspection and adjustment for motor vehicles that have traveled a certain mileage. The mileage at which secondary maintenance should be performed varies among different brands and models, and the specific interval should be determined according to the maintenance manual of the particular vehicle model. The purpose of secondary maintenance is to maintain the good working performance of various components, mechanisms, and assemblies of the vehicle, ensuring their normal operation between two secondary maintenance sessions. The main content includes the following aspects: 1. Engine section: Inspect cylinder pressure or vacuum, clean carbon deposits in the combustion chamber and grind valves if necessary, adjust valve clearance, and check for oil leaks from oil seals and the rear bearing of the crankshaft. 2. Clutch and transmission section: Check the effectiveness of the clutch and the bolts of the bottom cover, adjust the free travel of the pedal, and apply grease to the pedal shaft.
19
3
Share

What are the subjects for the driving test?

Currently, there are four subjects for the driving test. Below is a detailed introduction to these four subjects: 1. Subject 1: Road traffic safety laws, regulations, and related knowledge test. The structure of the test question bank and the basic question types are formulated by the Ministry of Public Security. 2. Subject 2: Field driving skills test, which includes test items such as reversing into a parking space, stopping and starting on a slope, making a right-angle turn, driving along a curve, and parallel parking. 3. Subject 3: Road driving skills test, with basic test items including preparation before driving, starting, driving in a straight line, changing lanes, passing intersections, and pulling over. 4. Subject 4: Safe and civilized driving knowledge, with test items related to safe and civilized driving.
1
3
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.