by Kay Layne
gas tank image by Mat Hayward from Fotolia.com
Automakers have gone to great lengths to improve the safety features of their vehicles. Fuel systems have a flapper valve that prevents gas from flowing out of the tank. Although driving a car without a gas cap is not dangerous, it is not recommended. Over time, driving without the fuel cap could lead to decreased fuel efficiency, engine damage, and damage to the environment.
On vehicles built after 1996, the “Check Engine” light will come on. Without the fuel cap, the gas will begin to evaporate. This could cause the engine to misfire in some vehicles and lower fuel pressure.
Dirt and other impurities can enter the fuel system, potentially damaging the engine.
The fuel system is designed to trap harmful gases and emissions that contribute to smog. If the cap is missing, these fumes will escape causing damage to the environment.