The 6 Main Electronic Fuel Injection System Parts Of Every Gasoline Engine

If you suspect your car or truck has a problem with its electronic fuel injection system, understanding each of its six main parts will go a long way toward locating the source of the problem.

Here is a list of each part, listed in order of how the gasoline flows from the fuel tank to the electronic fuel injectors:

1. The Fuel Tank  

Your vehicle's fuel tank serves the sole purpose of storing gasoline. Inside the cab is a gauge to tell you how much gas is inside the tank. However, the indicator can display the wrong amount if the gas tank is punctured or dented from running over something on the road. In addition, punctured tanks will leak gas and pose a severe safety issue.

2. The Fuel Pump

Your vehicle's fuel pump is located inside the gas tank. As its name implies, the purpose of the fuel pump is to move the fuel from the tank through the rest of the electronic fuel injection system. 

Fuel pumps fail after years of use. When a fuel pump starts to fall, you will experience the engine randomly sputtering or not wanting to start. A failing pump will also make a whining noise you can hear from the fuel tank.

To replace the fuel pump, your mechanic will need to remove the fuel tank, which makes this a significant repair.

3. The Fuel Line

Your vehicle's fuel pump is connected to a fuel line. This stainless steel or aluminum metal tube's purpose is to move gasoline from the fuel pump through the fuel filter and onto the motor. 

Fuel lines can wear out and can become damaged. Leaking fuel lines are a hazard but, thankfully, are inexpensive to replace.

4, The Fuel Filter

The fuel filter is connected to the fuel line between the fuel pump and the engine. This small device serves the purpose of filtering out any contaminants from the gasoline. Even specks of dirt or grime from the gas tank can cause severe problems for electronic fuel injectors.

Fuel filters clog, and when it happens, your car will act like it is struggling to get gas. It will randomly turn off, chug, or shutter while driving down the road. The good news is fuel filters are inexpensive and straightforward to replace.

5. The Fuel Delivery Line

Located between the fuel filter and injectors is a short fuel delivery line. This robust line's job is to deliver filtered gasoline to the fuel injectors.

6. The Fuel Injectors 

The fuel injectors are the most commonly replaced electronic fuel injection system parts in gasoline engines. Fuel injectors serve the purpose of spraying fuel for combustion. The vehicle's computer controls the amount of energy sprayed, thus called "electronic fuel injection."

Fuel injector problems will cause your vehicle's computer to throw codes letting your mechanic know which injectors are failing. 

Learn more about fuel injection system parts.