Resinous deposits and other contaminants from injectors and the fuel supply system can be removed by cleaning with special preparations. There are two commonly used cleaning methods: with and without removing the injectors.
Without removing it from the engine, the fuel supply system is flushed with special cleaning fluids.
To flush the system, fuel additives are produced, which are poured into the fuel tank in a certain proportion. Such additives can bind water contained in fuel, remove deposits in fuel lines and injectors, and clean spark plugs and valves. The use of such additives allows you to eliminate small contaminants; it is better to use them for preventive purposes, for example, if you had to fill your car with low-quality fuel.
A more effective cleaning method is to flush the system using special equipment at a specialized service center. In this case, the flushing unit is connected to the vehicle's fuel supply system before the fuel rail, the fuel pump is turned off and the fuel tank is disconnected. The engine runs for a certain period of time on a special liquid coming from the tank of the washing unit. As a result, the fuel rail, injectors, combustion chambers, and valves are cleared of resinous deposits.
The method of cleaning injectors with removal is advisable to use when other methods do not produce a noticeable effect. One of the ways to clean injectors is ultrasonic cleaning. In this case, the injectors are installed in a special unit. Before and during work, the injectors are tested. The injectors are checked for winding resistance, torch shape and spray quality, total and relative injection volumes, and tightness. If a fault is detected, the injector can be replaced.
Note: Removing the injectors will require replacing the sealing rings. In this case, it is better to install original rings.