Fuel pressure regulator malfunction: A faulty fuel pressure regulator may cause excessive fuel pressure to build up in the fuel line, leading to leaks and a gas odor.
Damaged fuel lines: Cracks or punctures in any fuel lines, including the return line or connections, can also result in fuel leaks and the smell of gas.
Faulty gas cap: A loose or damaged gas cap may not seal properly, allowing fuel vapors to escape and causing a gas smell.
Evaporative emissions system (EVAP) issues: The EVAP system is designed to prevent fuel vapors from escaping into the atmosphere, so any issues can lead to gas leakage and odor. A faulty purge valve, canister, or EVAP lines might be the cause.
Fuel tank or sending unit issues: If the fuel tank or fuel sending unit has leaks, gas may escape into the surrounding area, resulting in a fuel smell.
Incorrect fuel filler: Ensure that the vehicle is equipped with the correct fuel filler. If there is a loose fit, fuel vapors might be released through it.
Identifying the exact cause will require some inspection and possibly even pressure testing of the fuel system. It's recommended to get the vehicle checked by a trusted mechanic or a professional automobile service center to identify and fix the underlying problem.
