The gas cap is probably one of the most ignored parts on your vehicle. After all, you only see it when refueling. This is also probably why a lot of car owners have plenty of questions about this cap. If you're one of these car owners, take a look at some of the common questions asked about the fuel cap and the answers to these queries:
Is the gas cap really that important?
The fuel cap may have one simple task, but not using one can lead to a variety of car problems.it can actually cause you to fail an emissions test. This is because without a cap, the fuel fumes inside the tank gets into the atmosphere. It could then lead to excess emissions from your vehicle. You'll also easily contaminate the fuel if there's no cover to protect it from engine debris and road dust. Once debris and dirt particles get into the fuel tank, the filters will easily clog and wear out. In a worst-case scenario, you may have to shell out money for a new cap and filters. Plus, a coverless tank makes it easier to spill precious fuel, burning a hole in your pocket in the process. Another reason to make you appreciate the cap more is that your car becomes a fuel theft magnet once the cover is lost. Without this cap, it's easier for thieves to put a hose down your gas tank's filler neck once they've opened the fuel door and siphon off precious gasoline. So if you don't want to spend money on unnecessary repairs, don't just ignore this automotive component.
Will my vehicle become a fire hazard if I drive around without a gas cap?
Unfortunately, yes. But don't worry. Your car won't burst into flames if there's no cap attached to the gas tank. But because there's no cover to stop the gas fumes from escaping, the area around the tank becomes a fire hazard. Before someone accidentally lights a cigarette near your car's capless gas tank, attach a cover as soon as possible. This part is widely available at many stores and can be bought at affordable prices.
Will my mileage be affected if there's no gas cap attached?
Yes. It's possible to lose fuel efficiency by up to 2% if the fuel cap is missing or broken. This is because without a cover, the fuel will easily evaporate. The evaporation rate is multiplied a couple of times if you live in a place with a generally warm climate.
Can a fuel cap problem trigger the .check engine light.?
Yes. As a matter of fact, a loose or problematic cap is one of the most ignored parts during routine vehicle maintenance. Once the cap is lost or broken, the pressure inside the fuel tank changes. This will then trigger the .check engine light.. The solution here is quite simple: tighten or replace a worn-out gas cap. Once this is fixed, the light might turn off after a few days or even a week.