What to Do When the Fuel Tank Float Gets Stuck?
2 Answers
The solution for a stuck fuel tank float is: empty the gasoline from the tank, remove the float for adjustment, and replace it with a new one if adjustment is not possible. If the fuel tank float gets stuck, the fuel gauge reading may suddenly rise. This phenomenon mainly occurs when the linkage between the fuel level sensor and the float gets stuck, preventing the float from moving up and down normally. As a result, the sensor does not register changes, causing the fuel gauge needle to remain fixed at a certain position. The automotive fuel level sensor, also known as the fuel float, floats on the surface of the fuel layer. Utilizing the lever principle, the other end of the float is connected to a potentiometer. The amount of fuel determines the position of the float, and the potentiometer changes its resistance according to the fuel level, which is then displayed on the dashboard.
When driving and notice the fuel gauge needle isn't moving? A stuck fuel tank float is the most common cause. I encountered this annoying issue last time when driving my old Bora on a countryside trip - the gauge got stuck at the quarter mark and refused to budge. Don't panic, and avoid forcefully hitting the tank as that might worsen the situation. Try gently tapping several spots on the bottom of the fuel tank using your palm (not hard objects). If that doesn't work, try adding more fuel - the rising liquid level might dislodge the stuck float. Remember to carefully estimate your fuel level when driving to the repair shop, and it's best to carry a spare fuel can in the trunk to avoid getting stranded. Finally, have the mechanics inspect the float by removing the tank, and take the opportunity to clean out any sludge or debris inside. Replacing the float isn't expensive, usually around a hundred yuan. Never attempt DIY repairs on the fuel system yourself - those components are quite precise.
