As you drive your car, carbon builds up inside the fuel injectors and the engine resulting in your car consuming more gas and getting worse gas mileage. As a result, you have to fill your gas tank frequently which costs you money. Detergents and additives can slightly help deal with this problem but will not clear the clog completely. It is, therefore, necessary that you clean your car’s fuel injectors to keep your engine running smoothly.

You can get a professional to do the cleaning for you or you can do the cleaning yourself. The job can be done manually by removing the injectors or by simply using a fuel injector cleaning kit which is the most recommended DIY method.

Here are 5 tips to cleaning your fuel injector:

  1. Get The Right Cleaning Kit

There are different types of cleaning kits for fuel injectors that are available for purchase. It is important that you check on the compatibility of your car’s injector with the kit by checking the owner’s manual. There are instances where the kit that you’ve purchased may require that you make extra purchases for your adapters and connectors.

Fuel injector cleaning kits are comprised of a cleaning solvent, a gauge, and a hose.

  1. Find Your Car’s Fuel Port To Attach The Cleaning Kit

Your car’s engine fuel injector system is located on the fuel rail. If you are unsure of how to get to it, you can refer to the manual to determine the exact point where the fuel injectors are. You will also find step by step information on the manual on how to get your cleaning kit attached to the injectors. You need to get this right so as not to mess up anything else in the car.

  1. Keep The Engine’s Fuel Pump Disabled

You need to keep your engine’s fuel pump disabled when you are cleaning the fuel injector. You can do this by using a fuse box or by actually removing the fuel pump itself. After that, you’ll need to make sure that the return line is connected to facilitate the return of the fuel back to the tank.

Keep in mind that the fuel may be under pressure which may cause your car to display error codes after disconnecting, removing, or disabling the pump, so don’t be alarmed when you see this.

  1. Have The Pressure Regulator Disconnected And The Ignition Turned On

Since the cleaning kit will be providing pressure, it will be mandatory that you remove the fuel pressure regulator. Once this is done, you will have to turn the ignition on to make sure that the fuel pump is fully disconnected.

It is also advisable that your car’s gas tank cap stays removed for safety purposes. Doing this will prevent excessive pressure buildup in the car’s fuel injector system.

  1. Turn The Engine On

Ensure that the cleaning kit is connected and the pressure is adjusted to the correct levels before you start the car. Once that’s done, you can turn on the engine and allow the kit to use the cleaning solvent. This may take around 15 minutes to finish. Once the process is done, the engine will shut itself off when the whole solvent has completely been used up.


These 5 tips will guide you appropriately on how to clean your car’s fuel injector. Wondering which cleaner to use? Here’s our recommendation of the best fuel injection cleaner.