Should a Lean Fuel Condition Be Repaired?

[JordanFitz]

Fuel system lean condition occurs when the engine's oxygen sensor detects incomplete gasoline combustion with excessive air and insufficient fuel. It is recommended to immediately locate the nearest repair facility for further inspection and repair. Below is an introduction to automotive fuel systems: Diesel: With low ignition point and no spark plugs, it uses compression ignition. Process: The piston moves downward to intake air, then both intake and exhaust valves close as the piston compresses the air to 35-50 atmospheres, raising temperature. The fuel injector then sprays diesel which combusts violently upon contacting high-pressure air, forcing the piston downward. The exhaust valve opens as the piston moves upward to expel exhaust. Gasoline: Requires electronic ignition due to higher ignition point. Process: The intake valve opens as the piston moves downward to draw in the air-fuel mixture. The piston compresses the mixture to 15-20 atmospheres, then the spark plug discharges high voltage, causing violent combustion that drives the piston downward. When the piston moves upward again, the exhaust valve opens to discharge waste gases.