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#injectorcleaning #benchinjectorcleaning #cleaninginjectorswithoutremoving Injector cleaning. Bench or without removing from the engine. What is the difference and what you need to know. Advantages of cleaning injectors directly on the engine: you can do it yourself; not only the injectors are cleaned, but also the ramp, exhaust valves. Disadvantages are that if the injectors are very old, something can break off and get into the system with subsequent problems. There is no way to check the condition of the injectors for operability. You can diagnose and see the real condition of the injectors only with the help of bench cleaning. It is recommended to do bench cleaning if you have very old injectors or if you buy a neon car from someone else. If the car is new and you filled up with normal fuel, you can safely clean the injectors without removing them from the engine.