Cylinder Bank 1 System Too Lean at Idle
1 Answers
The causes of a lean air-fuel mixture at idle include clogged fuel injectors, excessive air intake/exhaust pipe leaks, and aging or cracked crankcase ventilation valve diaphragms. Additional information is provided below: Key inspection points for lean mixture conditions: Fuel injector spray pattern; Check the electronic control system; Verify if the engine's intake pressure sensor is faulty; Inspect for intake manifold leaks. Effects of poor fuel injection timing and atomization: Engine performance degradation during idle, acceleration or full-load conditions, resulting in reduced power output; Increased fuel consumption; Higher emission levels; In severe cases, may cause complete engine failure.