What does it mean when the fuel measurement system for cylinder bank 1 is too lean?
1 Answers
Cylinder bank 1, the fuel measurement system is too lean at idle speed, which is basically due to an intake system leak, with a focus on checking the exhaust gas valve. Specific details are as follows: 1. Reasons for the fuel measurement system being too rich at idle speed: The intake air sensor signal is abnormal. The correction signals for fuel injection from the coolant temperature sensor and oxygen sensor are abnormal. The fuel pump pressure is too high. There is leakage in the fuel injectors. 2. When engine knock is detected: Monitor changes in combustion chamber pressure; Detect the vibration frequency of the engine block. Monitor the combustion noise of the air-fuel mixture.