The human body runs on various systems. We have our circulatory system, skeletal system, respiratory system, and so on. We need each system to work properly to remain healthy. Our vehicles are the same. They contain a series of systems that work together to keep it functioning properly. Each system needs to be properly maintained and taken care of.

This is the sixth in a series of blogs we will be posting about the various vehicle systems and their function. Please also see:

  • Vehicle Systems: The Brake System
  • Vehicle Systems: Belts and Hoses
  • Vehicle Systems: Emission System
  • Vehicle Systems: The Exhaust System
  • Vehicle Systems: The Engine Cooling System


The fuel system is responsible for delivering fuel to the engine as needed. It works with the engine to help deliver top performance with low emissions.

Parts of the Fuel System:

  • Fuel filter
  • Fuel injectors
  • Fuel tank
  • Lines/Hoses
  • One or more fuel pumps
  • Pressure regulator

The fuel pump transfers fuel that is stored in the fuel tank and passes it through the fuel filter- to strain out any contaminants- before delivering it to the injectors. When activated, the fuel injectors spray a measured amount of fuel into the engine. The pressure regulator is in place to control the fuel pressure and ensure good engine performance under various speed and load conditions. In some vehicles, there is a return line system that is in place to return any unused fuel back to the tank.


Check your vehicle’s fuel system and change your fuel filter as recommended by your owner’s manual. Have the system inspected immediately if you smell gas or suspect a problem.

How often the fuel system needs service may vary depending on the quality of fuel used, the age of the vehicle, mileage, operating conditions, and maintenance history. Keep in mind that fuel pumps may fail if you regularly keep less than 1/4 of a tank of fuel in your car.

Signs that maintenance is required on the fuel system include:

  • Poor fuel economy
  • Performance issues such as misfires, and a decrease in power and acceleration
  • Difficulty starting
  • Vehicle won’t start at all
  • Whining noise from the fuel pump
  • “Check Engine” light is illuminated
  • You smell gas and you haven’t recently filled up

If your vehicle is displaying any of the symptoms above, or you suspect that your fuel system may be having an issue, have the vehicle inspected by the technicians at Meridian Automotive as soon as possible.


Meridian Automotive is happy to help with many of your fuel system needs. We offer:

  • Fuel pressure test
  • Fuel system parts maintenance, repair, and or replacement
  • Fuel filter changes

We also offer a “Fuel Induction System Cleaning Service.” We recommend this service around every 20,000 miles. It not only reduces emissions but improves drivability and fuel mileage. We clean the throttle body area and use induction system cleaner to clean the intake manifold area and intake valves. Also, a fuel additive is installed in the tank to clean the fuel injection system and remove carbon.

If you’re in need of a fuel system inspection and/or repair, don’t trust just anyone, trust the experts at Meridian Automotive. Call us at (208) 297-5573 or schedule an appointment online.

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