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Fuel injector cleansing procedure I use: Remove the Fuel injectors. Spray carburetor cleaner Upside down on them, to clean their inlet strainer. Plug a 1.5 feet long Hose, tight on their inlet. Secure it in place with a Clamp. Plug a couple of long wires to their power input, to connect them to the Car's Battery. Hold vertically the Hose, hanging the Fuel injector. Fill up the Hose with enough Carburetor Cleaner. Ask the Help of someone to Connect the Wires to the Battery, intermitently. (1 second intervals) Blow the crap out of the injector, by bursting high pressurized air to the Hose. When the Cleansing fluid is gone, fill up the Hose again... Repeat this procedure until the injector is Completely Clean! WARNING! The 12 Volts power should be Connected / Disconnected on one second intervals, otherwise the pressure buildup on the Hose, could cause it to Blow, spraying dangerous solvents and dirt all around. Be Careful! Important Notes: ► I forgot to shoot a photo while the cleansing process was ongoing, so since I already re-placed back the battery on the car, I did the last shot for the photo, there, and then I Cleansed the Battery properly; do Not do this Fuel injector cleansing procedures nearby the battery to avoid a spark that might start a fire with the chemical solvents; also Never forget to wear safety goggles during this procedure, please Take Care. ► You have to be Creative to Hook the Hose Properly on certain Fuel injectors, such like the Older style Subaru ones. ► I highly recommend to obtain brand new o-rings for the injectors, to be placed after the cleaning procedure has finished. ► The ideal carburetor cleaner usage, is around 4 to 5 oz of the can to each injector, or a whole 16 to 20 oz can of good quality, concentrated Carb Cleaner, distributed among four injectors. ► You'll need to fill up the Hose and blow with air several times 'till the injector sprays with a clean, defined pattern as it should. ► An average air compressor, has a common working pressure of 90 psi, while an average Car's fuel pump delivers much less psi. The mixture of that higher pressure with the amount of concentrated chemical solvent used, gives as result an incredibly clean fuel injectors, beyond any fuel additive could do. Disclaimer: Use all the information & Photos I share, at your own Risk! If you find this information & photos, Useful, Let me know by hitting the "Like" Button Kind Regards.