Symptoms of a Faulty Vacuum Switch in a Scooter?
2 Answers
Symptoms include continuous fuel flow from the fuel tank switch's outlet pipe when the engine is off. Here is relevant information: 1. Scooter Configuration: Scooters are mostly equipped with continuously variable automatic transmissions, similar to Mulan-style electric vehicles, without gear designs. After starting, you only need to twist the throttle, and releasing it will gradually slow down until stopping. Additionally, scooter wheels are smaller than those of other vehicles, and the transmission is mostly belt-driven. 2. Function of the Footboard: The footboard refers to the wide pedal between the seat and handlebars, allowing riders to place their feet on it while riding.
A while ago, the vacuum switch on my scooter malfunctioned. Initially, I noticed that the engine wouldn't start easily—it took several attempts to get it running. While riding, the scooter kept jerking, and when accelerating, it shook violently, almost like it was convulsing. The most obvious sign was a strong gasoline smell near the front of the scooter. After parking, I checked and heard a faint hissing sound from the engine compartment, like air leaking. I suspected a vacuum leak was causing uneven fuel supply. Although the dashboard didn't show any warning lights, fuel consumption noticeably increased after prolonged use. Later, upon disassembly, I found that the aging rubber seal on the switch had cracked, failing to maintain a vacuum seal. I quickly replaced the part to avoid the hassle of stalling on the road and needing a tow. This experience reminded me to pay more attention to regular vehicle maintenance.
