What are the symptoms of a faulty car EGR valve?
1 Answers
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.