The purpose of cleaning the fuel injectors is to remove the accumulation of fuel varnish deposits and contaminants that clog the injectors and affect their operation. They need periodic cleaning for optimal operation. Experts recommend cleaning the fuel injectors every 25,000 to 30,000 miles or once a year.

Cleaning the fuel injectors not only improves functionality, but also helps restore and improve engine performance, reduce emissions, and improve fuel economy.

One good thing about cleaning fuel injectors is that you can do it all yourself, without the help of an auto mechanic. However, if the injector is severely clogged, you may need your help. Let’s take a look at the different methods used in cleaning.

Method n. # 1: Using Fuel Injector Cleaning Kits

Fuel Injector Cleaning Kits are available at any auto supply store. Before connecting the kit, locate the fuel injector and take the necessary measures to prevent fuel from entering the injectors. You can do this by using a tube to bypass the fuel injector so that fuel returns to the tank or by removing the fuel pump and blocking the fuel return line. Once done, disconnect the fuel pressure regulator.

Now, connect the cleaning kit to the fuel inlet port and remove the fuel cap from the tank to relieve any pressure in the tank that may build up with the kit. Open the valve of the cleaning kit until its pressure value matches the injection pressure value (you can find the injection pressure value of your car engine in the manual).

Once the cleaning kit reaches the required pressure setting, start the engine so that the cleaning solvent from the kit passes through the injector and removes dirt and debris that has clogged the fuel injector. This will take a few minutes. Once done, shut off the engine, remove the kit, and reconnect the fuel lines, fuel pump, and fuel pressure regulator. With this, the cleanup job is done. You may notice a significant difference in your engine’s performance after cleaning.

Method n. # 2: add cleaning additives to fuel

Adding cleaning additives, also called detergents or deposit control additives, to the fuel helps control the build-up of dirt and debris in the fuel tank. These additives help reduce the volatility of the lighter fuel components. Although gas station fuel contains certain additives, some suppliers may not add the required amount of detergents; some even use low-cost and less effective alternatives. Therefore, you must add additional additives to the fuel.

One of the best commonly used additives is polyetheramine (PEA). Although it is a bit expensive compared to others, it has been shown to be effective in keeping injectors, valves and combustion chamber clean and does not require additional fluidizers.

Method n. 3: manual cleaning

Cleaning in the car may not be as effective for a heavily clogged injector because the cleaning solvent cannot get through during the cleaning cycle. So when in-car cleaning doesn’t work, you can do out-of-car cleaning, which involves removing the injector from the vehicle and cleaning it. However, this

it has to be done at the service center.

Cleaning outside the car requires special equipment and takes more time compared to cleaning inside the car. However, this is more effective as it thoroughly cleans every part of the injector. In addition, it also allows you to perform flow tests that verify the spray pattern and volume of the nozzles to confirm that they are being cleaned properly.

Precautions

• Be sure to disconnect the pressurized fuel connection

• Make sure there are no high pressure fuel or solvent leaks from the engine while it is running. These solvents are highly flammable.

• Wear safety glasses to protect your eyes

• Close all open sources of ignition, such as spark plugs.

• Avoid contact with cleaning solvent

• Only use specific cleaning kits for cleaning fuel injectors. Do not use other cleaners such as carburetor cleaners, brake cleaners, etc.

• Do not abuse fuel additives, as they can eventually damage expensive catalytic converters.

These are the popular methods used for cleaning fuel injectors. If you experience clogged injectors frequently, it is best to replace them with good quality injectors that provide optimal performance for a longer time.