Cleaning fuel injectors become necessary to remove the crud that accumulates on the inside as well as outside of these little parts. It is needed to ensure that an even flow of fuel is being supplied to your engines’ pistons. It is also an ideal way to see what kind of cleaning and maintenance is required if you were looking to tune up your car. One of the advantages of ultrasonic cleaning is that it does not damage any part of what you are cleaning neither does it cause scratches, irrespective of delicacy and size. You also get a higher degree of cleaning efficiency as compared to manual or other cleaning methods.
The process of cleaning fuel injectors with ultrasonic cleaners goes like this. Before getting down to the actual cleaning, each injector will have to be flow tested. This determines the level of cleaning it needs. While professional set-ups have elaborate flow testing machinery, if you are planning to do this at home, you can easily set one up with a little technical knowledge. Once this is done, you will have to dismantle the injector. The first would be to remove the upper and lower O-rings and soak them in a cleaner. Be sure to note where the exact placements of these rings are so that they can be replaced. Professionals will not have any trouble with this. If you are not sure, do some research and consult with some experts (offline or online) on this before dismantling.
Next, the fuel injectors should be placed in an ultrasonic cleaning tray along with the necessary cleaning solution. Care should be taken here to ensure that the cleaning solvent does not harm the plastic components if any. If you are doing this at home and are unsure of the solvent’s reaction to plastic, then soak an old injector overnight to see what happens. Once the fuel injectors are clean, they are flow tested again to check for accuracy of flow pressure.
The fuel injector cleaners of today are not the simple turn-on, turn-off types. Many models now include stages of cleaning which serve to enhance its performance. To increase cleaning uniformity gas should be removed from the cleaning solution prior to the ultrasonic cleaning. This is known as degassing. It has been found that cleaning solutions that have not been degassed can lead to trouble in cleaning hard to reach areas. Many ultrasonic cleaners now have a degassing mode before it begins the actual cleaning.