How long it takes to clean your fuel injectors can vary slightly, but you should expect it to take anywhere from 45 minutes to 1 hour for a professional mechanic to clean your fuel injectors.
That may seem like a long time—but it’s necessary for the cleaning process, which involves submerging your fuel injectors in a chemical bath and mechanically opening and closing them close to 30,000 times. When you take that amount of work into consideration, 60 minutes may not seem like so long, after all!