What Causes a Fuel Trim System to Run Lean?

1 Answers
IsabellaMarie
07/29/25 4:42am
Fuel trim system running lean is caused by a malfunctioning air-fuel ratio sensor. Below is an introduction to fuel: 1. Fuel: Fuel is used as an energy source for internal combustion engines, primarily categorized into gasoline and diesel. 2. Classification: (1) Gasoline: Gasoline is classified based on its octane rating. (2) Diesel: Diesel is classified according to its freezing point. (3) Unleaded gasoline: Only super unleaded gasoline can be used in Formula 1 (F1), although it is largely similar to the 98-octane unleaded gasoline available at regular gas stations, F1 fuel contains additives to ensure faster and more efficient combustion.
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