What to Do When the Fuel Tank Pressure is Too High in a Small Car?
2 Answers
When the fuel tank pressure is too high, it is necessary to promptly clean the fuel line or replace the filter. Below is some information about the fuel tank: 1. Fuel tank capacity: The fuel tank capacity varies by vehicle model, and even among different brands of the same type of vehicle, as there is no national standard. However, most car manufacturers follow a general rule that a full tank of fuel typically supports driving for about 600 kilometers, and not less than 500 kilometers. 2. Actual fuel tank capacity: The actual capacity of the fuel tank is greater than the nominal capacity. According to fuel safety regulations, the nominal capacity of a car fuel tank is set at 95% of the rated capacity. Therefore, when filling up, you can add up to 10% more fuel than the nominal capacity.
I've been driving for twenty years and encountered high fuel tank pressure several times. It's a pretty common issue. Usually, it's caused by a loose fuel cap or problems with the ventilation system, like a clogged charcoal canister leading to vapor buildup. The solution is simple: first, find a safe place to park, then slowly open the fuel cap to release the pressure—don't rush or panic to avoid sudden pressure release causing injury. After that, check if the cap is loose or if the rubber seal is damaged. If it's dirty, clean it with water, dry it, and try again. If the problem persists, it's likely an issue with the ventilation tube or charcoal canister, requiring a thorough inspection, cleaning, or part replacement at a repair shop. High pressure can deform the fuel tank or cause leaks, and it's even more dangerous in hot weather, potentially leading to an explosion. So don't delay—until it's fixed, minimize long drives and avoid filling the tank completely. I regularly schedule maintenance and ask the technician to check the system to prevent recurrence.
