What are the symptoms of a faulty exhaust gas valve?
2 Answers
The symptoms of a faulty exhaust gas valve are as follows: 1. The EGR valve is stuck in the fully open position and cannot close completely: This can cause the engine to stall at idle or exhibit unstable idling, as well as produce large amounts of black smoke during operation. It may also be accompanied by a decrease in engine power. 2. The EGR valve passage is clogged with deposits: If the normally closed solenoid valve or valve seat accumulates deposits or impurities, it can lead to incomplete closure when the solenoid coil is de-energized, resulting in unstable engine idling, failure to start, backfiring in the intake manifold, or stalling. 3. Insufficient power during high-speed engine operation: If the engine experiences power loss or speed drops, this indicates that the EGR valve cannot close properly.
If the exhaust gas recirculation (EGR) valve fails, the car will exhibit some noticeable issues. The most common symptom is the sudden illumination of the engine warning light, acting like a warning sign to prompt a check. At idle, the car will shake noticeably, with vibrations felt even in the driver's seat, indicating a problem with the exhaust gas recirculation. Acceleration also becomes sluggish, with delayed response when pressing the throttle, making overtaking feel underpowered. Fuel consumption inexplicably increases—what used to be 500 kilometers on a full tank now drops significantly. More annoyingly, tailpipe emissions worsen, and if starting in cold weather, the car may struggle to crank, making groaning noises. These symptoms are mostly caused by a clogged or leaking EGR valve. If not repaired promptly, it could affect other components like the catalytic converter. I recommend going to a shop to scan for trouble codes as soon as possible, since a misbehaving car can cause unnecessary delays.
