What are the symptoms of a faulty EGR in an engine?
3 Answers
EGR valve failure symptoms include: engine malfunction, reduced engine power, etc. Affecting normal engine operation: A faulty EGR valve can disrupt normal engine operation, leading to unstable idling or stalling at idle, flashing warning lights, oil burning, power loss, black smoke from the exhaust pipe, and other phenomena that affect vehicle performance. Reduced engine power: If the EGR valve is damaged and remains stuck open, it can cause the engine to stall at idle, have unstable idling, experience weak acceleration or increased fuel consumption, along with a noticeable decrease in engine power. Impact on vehicle exhaust emissions: If the EGR valve is damaged and remains stuck closed, it will affect the vehicle's exhaust emissions, potentially causing them to fail to meet standards, which could result in failing the annual inspection.
When the EGR system fails, I notice a significant change in the engine's performance. The most common symptom is the sudden illumination of the check engine light on the dashboard. While driving, the idle becomes particularly unstable, and when parked, the car continues to vibrate, as if shivering. Acceleration becomes notably slower, with delayed response when pressing the throttle, and fuel consumption increases by about 20%. If you listen carefully, you can also hear knocking sounds inside the engine, like metal striking. This is mainly due to the exhaust valve sticking or leaking, causing excessively high combustion temperatures. If not addressed promptly, pollutant emissions will increase, and it may accelerate wear on other engine components, leading to more expensive repairs. It is recommended to visit a professional repair shop as soon as an issue is detected—replacing a small part can resolve most problems.
A few days ago, the EGR in my car malfunctioned, making driving a real ordeal. After starting, the car shook violently, especially when stopping at red lights—it felt like a massage chair set to maximum intensity, with both the steering wheel and seats vibrating. On the highway, acceleration was sluggish; even flooring the pedal resulted in slow speed increases, accompanied by a burnt smell that made my family complain about the stench inside. Fuel consumption also noticeably increased—previously, a full tank could last 500 km, but now it barely reaches 400 km, hitting my wallet hard. This kind of issue makes driving frustrating and distracting, compromising safety. Getting it fixed at a repair shop ASAP is the way to go.
