Is High Fuel Tank Pressure a Scam?
2 Answers
High fuel tank pressure is not a scam. Below are specific explanations regarding the fuel tank: 1. Definition: A container for fuel on aircraft or automobiles, specifically designed to store hydraulic oil or fluid in a hydraulic system. 2. Types: Fuel tanks can be divided into two types: open tanks and closed tanks. The tank must have a sufficiently large volume; the suction pipe and return pipe should be inserted below the lowest liquid level to prevent air suction and splashing of returning oil that creates bubbles; the distance between the suction pipe and return pipe should be as far apart as possible, with a partition installed between them; to maintain oil cleanliness, the tank should have a sealed cover plate around the perimeter, equipped with an air filter; the bottom of the tank should be at least 150mm above the ground; special attention should be paid to the anti-corrosion treatment of the inner surface of the tank.
I've encountered this before. The repair shop said the fuel tank pressure was high and needed expensive cleaning, but when an experienced technician checked it, it turned out to be just a worn-out seal on the fuel cap. Normal fuel tanks are supposed to have pressure to prevent gasoline evaporation. When parked in the sun during summer, the fuel expands and it's normal to hear a 'pop' sound when opening the cap. Real problems are usually caused by a clogged charcoal canister or stuck pressure relief valve in the fuel cap, which can be fixed by replacing the cap for just a few dozen bucks. I suggest trying to loosen the fuel cap and drive for a couple of days first. If the dashboard doesn't show any warning lights and the engine runs smoothly, they're probably trying to scam you. Of course, if the fuel pump keeps clicking off when refueling and there's a gasoline smell, then you should check the charcoal canister vent tube.
