
The fuel tank cap may not pop open due to reasons such as it being stuck or rusted, a damaged fuel tank motor, or the loss of elasticity in the fuel tank cap spring. Below is an analysis of the possible reasons why the fuel tank cap won't open: 1. Rusted fuel tank cap: You can ask a gas station attendant for help; a slight pry or tap, while pressing the fuel tank cap switch, should open it. 2. Damaged fuel tank motor: Most modern vehicles rely on a motor to lock the fuel tank cap, so a faulty motor could be the reason the cap won't open. 3. Loss of elasticity in the fuel tank cap spring: The owner can address this by adding a small spring to the rubber pad on the fuel tank protrusion to increase elasticity between the fuel tank cap and the locking mechanism.


