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What are the symptoms of a faulty EGR valve in a diesel engine?

1 Answers

OEverly

07/30/25 8:59am

Diesel engine EGR valve is the exhaust gas recirculation system valve. The following are the symptoms when the EGR valve fails: 1. Symptoms of a faulty EGR valve include extremely unstable idle or even stalling, flashing malfunction indicator light, failure to meet annual emission inspection standards, burning engine oil, and blue smoke from the exhaust. 2. When the EGR valve remains open, the car may exhibit black smoke, poor acceleration, and increased fuel consumption. Extended content: The EGR valve, also known as the exhaust gas recirculation valve, is a mechatronic product installed on diesel engines to control the amount of exhaust gas recirculated into the intake system. It is a very important and critical component in the exhaust gas recirculation device. Its function is to control the amount of exhaust gas entering the intake manifold, allowing a certain amount of exhaust gas to flow into the intake manifold for recirculation.

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Why Doesn't the Disc Brake Caliper Piston Retract?

Disc brake seizure and failure to retract are caused by water entering the brake fluid, leading to rust on the caliper piston. Below are the reasons why the brake pedal becomes hard and difficult to press: 1. Vacuum booster issue: This situation definitely indicates a problem with the vacuum booster. Whether at low speed or not, under normal driving conditions, the negative pressure in the intake pipe should draw air into the vacuum booster. 2. Vacuum booster air leak: The vacuum booster is always in a state of energy storage. If the brake pedal becomes hard after one press, it might be due to too low speed and too high a gear, resulting in insufficient intake negative pressure to draw air. However, if the pedal is hard on the first press, it definitely means the vacuum booster is leaking air. 3. Hydraulic brake system: Because a hydraulic brake system is used. When the engine is off, the hydraulic pump driving the hydraulic brakes is not working, causing a sharp increase in brake resistance, which is reflected in the pedal becoming very heavy and hard.

What is an Engine?

An engine is a machine capable of converting other forms of energy into mechanical energy. Engine: It can refer to both the power generation device and the entire machine including the power unit (e.g., gasoline engine, aircraft engine). The engine was first invented in England, so the concept of an engine also originates from English, with its original meaning referring to "a mechanical device that generates power." External Combustion Engine: This means its fuel burns outside the engine. Invented in 1816 by R. Stirling of Scotland, it is also known as the Stirling engine. The engine converts the thermal energy generated by this combustion into kinetic energy. The steam engine improved by Watt is a typical example of an external combustion engine. When a large amount of coal burns to produce thermal energy that heats water into a large amount of steam, high pressure is generated. This high pressure then drives mechanical work, completing the conversion of thermal energy into kinetic energy.

How Many Days Does It Take to Check National Day Highway Violations?

National Day highway violations can be checked within one week. Online inquiry: Visit the official website of your provincial public security traffic police, enter the license plate number and vehicle identification code, and all violation information will be displayed. Penalties for speeding violations on highways: Speeding less than 10%: warning, no penalty; speeding 10% to 20%: fine of 200 yuan, deduct 3 points; speeding 20% to 50%: fine of 200 yuan, deduct 6 points; speeding over 50%: fine of 2000 yuan, deduct 12 points, and revoke the driver's license. Inquiry at the local vehicle management office: Bring the vehicle registration certificate and the owner's ID card to the vehicle management office where the license plate is registered, and they will check all violations. However, this is limited to violations within the province and those in networked provinces.

Can I get my car inspected during the October holiday?

You cannot get your car inspected during the October holiday. Statutory holidays: Because the National Day is a statutory holiday, the vehicle management office will also be closed. Although there may be staff on duty, they will not handle business. After all, these seven days of statutory holidays are what everyone looks forward to, and car inspections are generally not conducted during this time. Working hours: The working hours of vehicle management offices vary in different regions. Some are from 8:30 to 18:00, while others are from 9:00 to 19:00, and the working days are from Monday to Friday. However, not all offices follow this schedule. Some offices are open from Saturday to Sunday, with longer working hours.

Will the steering gear make a clunking noise when driving on rough roads if it's broken?

Yes, in this situation, it is necessary to check whether the play in the outer tie rod ball joint of the steering gear is normal, and whether the play in the internal tie rod ball joint of the steering gear is normal. 1. Solution: If any abnormality is found, simply replace the tie rod ball joint; there is no need to replace the entire steering gear. However, if there is excessive play in the internal gear rack of the steering gear, and the issue persists after adjusting the play, then replacement is the only option. 2. Fault inspection: Generally, when there is abnormal noise from the chassis while driving on rough roads, first check the car's shock absorbers. Based on the location of the noise, determine the specific area. When the car is parked on flat ground, the distance between the car and the ground is too small, making it difficult to inspect for faults. It is best to take the vehicle to a repair facility, where it can be lifted with a hoist to check for gaps in the shock absorbers and whether there are any faults in the suspension.

How much nitrogen should be added to a 68 breaker hammer?

68 breaker hammer typically requires a pressure value of around 1.4-1.6MPa. Power source: It is powered by the pressure oil provided by the pump station of an excavator or loader, which can more effectively remove floating stones and soil from rock crevices during building foundation excavation. The principle for selecting a hydraulic breaker is to choose the most suitable one based on the excavator model and the working environment. Hydraulic breaker: Hydraulic breakers have become an important working tool for hydraulic excavators. Some people also install hydraulic breakers on backhoe loaders (also known as two-way machines) or wheel loaders for breaking operations. Hydraulic breakers are also called hydraulic breakers or hydraulic crushers (hydraulic breaker).

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