What are the symptoms of exhaust gas recirculation failure in domestic new cars?
2 Answers
Symptoms of exhaust gas recirculation failure in domestic new cars include difficulty starting, engine shaking, unstable idling, and weak acceleration. After the exhaust valve is damaged, it can also lead to engine oil burning and blue smoke from the exhaust pipe. Introduction to the exhaust valve: Also known as the oil-gas separator or pressure control valve, it is installed between the compressor outlet and the condenser inlet. By separating oil and gas, it improves the heat transfer effect in the condenser and evaporator. Its function is to allow car exhaust gas to recirculate into the cylinder for combustion. This small amount of exhaust gas reduces the temperature during cylinder combustion and also decreases the content of nitrogen oxides in the exhaust gas. Causes of exhaust valve damage: Poor quality of the exhaust valve itself, improper maintenance, poor fuel quality, aging of the exhaust valve, etc.
I encountered an EGR failure with my domestically produced SUV that I bought just last year. The most obvious symptom was the car struggling to accelerate, as if gasping for breath - I'd press the gas pedal but the speed wouldn't pick up for quite a while. The yellow engine light on the dashboard would come on, sometimes accompanied by slight shaking. When waiting at red lights, I could feel the seat vibrating with a humming sensation. The most annoying part was the sudden spike in fuel consumption, jumping from 8L/100km to 10L/100km, with noticeably thicker black smoke from the exhaust pipe. My friend's car had an even worse case - the emissions fault light came on directly. It took three visits to the 4S shop before they discovered the EGR valve was stuck due to carbon buildup. For new cars experiencing this situation, I recommend not trying DIY fixes - just use the warranty for peace of mind.
