Yes, a Fuel Pump leak can cause a gas smell in the car, but this condition could get out of hand very fast. The Fuel Pump transfers fuel from the tank to the engine and works at high pressure. A minor crack or an impaired seal or an impaired hose in the system of the Fuel Pump allows gasoline to escape, creating an odor that can be smelled easily. In fact, according to automotive experts, a Fuel Pump leak can result in fuel vapor being released into the vehicle’s cabin or underneath the car, leading to a strong gasoline smell.
Gasoline is highly volatile and, when evaporated, may permeate even through the tiniest gaps or cracks in a system. According to NFPA, fuel leaks in vehicles are responsible for more than 17,000 fires yearly in the U.S., thus showing the potential dangers of unresolved leaks in the Fuel Pump system. Gas odors are signs of something bigger, like a seal of the Fuel Pump compromised or a fuel line.
Usually, in these situations, the performance of the car is not affected directly by a leak in the Fuel Pump system; it may, however, develop over time into loss of fuel economy, misfires, or a complete failure of the engine. In fact, a leak in the Fuel Pump can decrease the fuel pressure by 20 to 30 psi, which will impact the engine’s capability to get appropriate fuel. It also creates a potential fire hazard if not checked, especially at high temperatures.
If a fuel leak occurs, most mechanics would suggest that one should have the Fuel Pump and surrounding fuel lines inspected for visible wetness or fuel staining. These leaks can occur on any part of the lines, but the most sensitive areas are the Fuel Pump itself, the fuel tank, or the fuel filter. Some vehicles have onboard diagnostic tools that will allow the driver to recognize the problem with the fuel system. For example, all modern cars equipped with an OBD-II may illuminate a “Check Engine” light in case of a leak of the fuel system and thus offer an early warning to prevent damage.
The Fuel Pump may leak and, therefore, cause a gas smell in the car, which shows that some problems may arise that have to be fixed right away. Besides this annoying smell, ignoring such signs may result in serious hazards involving either the engine or fire. Regular maintenance-a fuel line check for wear and tear, proper sealing of the Fuel Pump-can avoid expensive repairs and safety concerns.