What are the symptoms of a faulty exhaust valve in the Besturn B50?
1 Answers
The following symptoms may occur: unstable idle speed and stalling. When the exhaust valve is damaged, some exhaust gas will enter the engine intake pipe through the exhaust gas recirculation valve during idle operation. Since the amount of air-fuel mixture is minimal during idle, the exhaust gas dilutes the mixture concentration, significantly affecting the engine's idle operation. This can cause the engine's idle speed to become extremely unstable and may even lead to stalling. Additional information: Function of the exhaust valve: The exhaust valve, also known as the oil-gas separator or pressure control valve, is installed between the compressor outlet and the condenser inlet. It improves heat transfer efficiency in the condenser and evaporator by separating oil and gas. Its role is to allow a portion of the vehicle's exhaust gas to recirculate into the cylinder for combustion. This small amount of exhaust gas reduces the combustion temperature in the cylinder and lowers the NOX content in the exhaust emissions.