AUTOOL C100Product OverviewThe AUTOOL C100 is a petrol EFI fuel injector and fuel system cleaner kit designed for non-dismantle cleaning of fuel injectors, throttle valves, intake systems, TWC-related passages, and gasoline fuel supply systems. It includes multiple adapters for many European, Asian, and American cars and light trucks, and uses adjustable compressed-air pressure for different cleaning tasks. Petrol EFI Vehicles Fuel Injector Cleaning Throttle Cleaning Pressure Adjustment40-50 PSIEFI Cleaning1-5 PSIThrottle StyleMulti-AdapterCar Coverage3 YearsMain Unit Warranty Click to enlargeKey FeaturesKey FeaturesC100 combines fuel system flushing, intake cleaning, throttle cleaning, pressure adjustment, and adapter coverage in one portable cleaner kit for gasoline vehicle maintenance.Non-Dismantle CleaningClean petrol EFI fuel injectors, fuel lines, throttle-related passages, and fuel system components without removing the injector assembly from the vehicle.Fuel System FlushingHelps improve fuel supply, support fuller combustion, and reduce exhaust emissions when used with the correct detergent and connection method.Intake System CleaningSupports intake system cleaning to help reduce carbon deposits, improve the oil-gas mixture ratio, and smooth idle speed under proper service conditions.TWC Cleaning SupportThe kit includes TWC cleaning joints and can be used for TWC and intake manifold flushing procedures according to the user manual.Adjustable Working PressureThe pressure gauge and regulating valve help adjust air pressure for better detergent sprayability and safer cleaning across different systems.Wide Adapter CoverageThe adapter kit covers many EU, Asian, and USA cars and light trucks, including commonly used hose couplings, vehicle adapters, clamps, and nozzles. Click to enlarge Click to enlarge Click to enlargeApplicationsApplicationsUse C100 for petrol vehicle fuel system cleaning tasks where the correct detergent, pressure, adapter, and connection method can be confirmed before operation.Petrol EFI Fuel SystemSuitable for gasoline EFI fuel injector and fuel supply system cleaning on supported petrol cars and light trucks.Throttle Valve AreaSupports throttle body and related intake passage cleaning with the spray nozzle kit and correct low-pressure procedure.Intake Manifold FlushingCan be used with TWC detergent and the TWC flushing kit through the intake vacuum pipe procedure described in the manual.TWC / Exhaust-Related CleaningSupports TWC and exhaust pipe flushing steps when matched with the correct detergent, nozzle kit, engine speed, and safety setup.Related GuidesRelated GuidesChoose the connection method according to the vehicle fuel system layout. Confirm the fuel inlet hose, return hose, adapter fitment, air source pressure, and leak-free connections before starting the engine.Pressure And Connection SummaryEFI Fuel SystemFind the fuel return hose, disconnect it, plug it with a suitable adapter, then connect the fuel inlet hose to the cleaner outlet hose with the proper adapter.EFI Cleaning PressureAdjust the compressed-air source to about 40-50 PSI for EFI fuel system cleaning, then check all connection points before starting the engine.Manual Pressure ReferenceThe manual describes adjusting air pressure within about 0.3-0.4MPa for fuel system flushing.No Return HoseIf the vehicle has no return hose, remove the fuel pump fuse or disconnect the fuel pump power cable so the fuel pump will not work during cleaning.Throttle / Carburetor StyleThe connection method is similar, but the air source pressure should be adjusted to low pressure, about 1-5 PSI. The manual also gives a carburetor reference of 0.07-0.35kgf/cm².Hose IdentificationThe inlet hose is usually larger, the return hose is usually smaller, a filter is often connected on the inlet side, a buffer is often on the return side, and arrows may show fuel flow direction. Pressure And Connection SummaryEFI Fuel SystemUse proper adapters for fuel return and fuel inlet hose connections.EFI PressureAbout 40-50 PSI; manual reference about 0.3-0.4MPa.No Return HoseRemove the fuel pump fuse or disconnect fuel pump power.Throttle StyleUse low pressure, about 1-5 PSI.Hose CheckConfirm inlet, return, filter, buffer, and fuel-flow direction before operation. How To UseHow To UseFollow the correct connection method for the target system. Always add the proper detergent, use compressed air, check every connection for leakage, and release pressure before disconnecting the cleaner.1. Identify Fuel HosesFind the fuel return hose and fuel inlet hose. The inlet hose is usually larger, and a filter is often connected on the inlet side.2. Connect The Return SideDisconnect the fuel return hose and plug it with a suitable adapter. Wrap disconnected connectors with a towel to reduce fuel splash risk.3. Connect The Cleaner OutletDisconnect the fuel inlet hose and connect it to the C100 outlet hose with the proper adapter.4. Handle The Fuel PumpConnect the outlet and return hose of the fuel tank. If there is no return hose, remove the fuel pump fuse or disconnect fuel pump power so the pump will not work.5. Add Detergent And AirPour the proper cleaning fluid into the C100 bottle, connect compressed air to the air port, and adjust pressure for the selected cleaning task.6. Check And CleanCheck all connection points to confirm there is no leakage, then start the engine to clean the fuel system.Additional Cleaning ProceduresThrottle style cleaning: use the same basic connection logic but adjust the air source pressure to about 1-5 PSI.TWC and intake manifold flushing: pour TWC detergent into the bottle, connect the TWC flushing kit, insert the nozzle into the intake vacuum pipe, start the engine, and open the ball valve slowly so detergent enters the engine vacuum pipe gradually.TWC flushing time: the manual describes a flushing process of about 30-40 minutes, with engine speed raised at intervals according to the procedure.Throttle body and exhaust pipe flushing: connect the spray nozzle kit, remove the pipe ahead of the throttle, place the spray nozzle in the throttle body, start the engine, and open the fuel outlet ball valve.After cleaning: reconnect all pipes, drain pressure from the C100 bottle before disconnecting, and check that all fuel system pipes are restored without leakage.Before You Order And UseBefore You Order And UseC100 works with gasoline fuel systems, detergent, compressed air, and a running engine. Confirm safe connections, correct pressure, ventilation, and fire protection before on-vehicle cleaning.Petrol Vehicle FocusThe product content focuses on petrol / gasoline EFI vehicles. Confirm compatibility before using it on other fuel systems.Compressed Air RequiredC100 requires a compressed-air source. Adjust the pressure according to the target system and do not use excessive pressure.Stop For Fuel LeaksStop the engine immediately if any fuel leakage is found. Do not continue cleaning until the connection is safe.Prevent Splash And FireWrap pipe connectors with a towel when disconnecting them to reduce splash risk, and keep a fire extinguisher nearby during on-vehicle cleaning.Vent Exhaust OutdoorsLead exhaust outdoors during on-vehicle cleaning because exhaust contains toxic and hazardous gases.Secure The VehiclePlace the transmission in neutral and apply the brake before on-vehicle cleaning.Before And After OperationWear protective gloves and protective clothing when operating the cleaner.Use only the detergent type required for the cleaning task and follow detergent instructions.Check every connection point before starting the engine; there must be no leakage during cleaning.Drain the pressure in the C100 bottle after flushing before disconnecting the cleaner.Restore all fuel system pipes after cleaning and confirm there is no leakage.After throttle body cleaning, the throttle position sensor may need to be initialized with an automotive scan tool to avoid a fault light or DTC.Maintenance And CareMaintenance And CareRegular care helps keep the C100 cleaner safe, stable, and ready for the next service job.Check ConnectionsRegularly check parts that need tightening and connection. Tighten loose parts in time to support safe operation.Protect The HousingAvoid rubbing the product against rough surfaces, especially the sheet metal housing.Prevent CorrosionClean and protect external and internal parts that contact chemical media to improve corrosion resistance and service life.Avoid OverloadFollow safe operating procedures, do not overload the equipment, and eliminate unsafe factors in time.Inspect Wires And Wear PartsCheck the circuit section and replace aging wires or worn parts when needed. Regularly clean or replace consumable parts such as the oil pump and oil filter when applicable.Store DryWhen not in use, store the C100 in a dry place. Do not store it in hot, humid, or non-ventilated environments. Click to enlargeWhat Is In The BoxWhat Is In The BoxThe packing list image shows the C100 cleaner body, pressure regulator, gauge, hoses, funnel, clamps, nozzles, TWC cleaning joints, and multiple adapters for different vehicle fuel system connections.Main CleanerC100 cleaner bottle body with pressure gauge and regulating valve assemblyHoses And CouplingsUniversal hose quick coupling, leader air hose, universal fast connector, hose plug, thread plug, and related hose adapters shown in the imageVehicle AdaptersAdapters shown for European, Asian, GM, BMW, Chrysler, Lincoln, Ford, Mazda, Toyota, BYD, Audi, Honda, Passat, Volkswagen, Mitsubishi, Land Rover, KIA, and other supported modelsCleaning AccessoriesThrottle cleaning nozzle, TWC cleaning joints, addition funnel, return pipe clip, and hose clampsFinal ContentsRefer to the package image and the actual product package for final included accessories and adapter appearance.Manual And DownloadsManual And DownloadsDownload the AUTOOL C100 manual for fuel system connection diagrams, EFI cleaning, no-return-hose connection, throttle body cleaning, TWC and intake manifold flushing, maintenance, warranty, and safe-use instructions. Click to enlargeAUTOOL C100 Fuel System Cleaner User ManualUse the PDF manual to confirm connector setup, pressure adjustment, detergent path, engine operation, pressure release, and post-cleaning restoration before operation. Download ManualNeed Fitment Or Setup Confirmation?Contact AUTOOL Store before ordering if you need to confirm petrol vehicle compatibility, adapter fitment, cleaning detergent, compressed-air pressure, EFI connection, no-return-hose setup, TWC flushing, or package contents. Email[email protected] WhatsApp 86 189 2647 7404Questions And AnswersThese answers cover petrol vehicle compatibility, compressed air, EFI pressure, throttle pressure, hose identification, no-return-hose setup, safety checks, throttle initialization, package contents, and warranty support. Is AUTOOL C100 Suitable For Diesel Vehicles? The C100 product content focuses on petrol / gasoline EFI vehicles. Do not assume diesel compatibility from this page. Contact AUTOOL Store before using it on any fuel system outside petrol EFI applications. Does The C100 Need An External Air Source? Yes. AUTOOL C100 requires a compressed-air source. Connect the air source to the cleaner air port and adjust the pressure according to the target cleaning system. What Pressure Should I Use For EFI Fuel System Cleaning? The product page procedure uses about 40-50 PSI for EFI fuel system cleaning. The manual also describes adjusting air pressure within about 0.3-0.4MPa for fuel system flushing. Use the correct pressure for the vehicle and cleaning task, and check for leakage before starting the engine. What Pressure Should I Use For Throttle Or Carburetor Style Cleaning? For throttle style cleaning, adjust the air source pressure to about 1-5 PSI. The manual also gives a carburetor fuel system reference of 0.07-0.35kgf/cm². Use low pressure and confirm the connection before opening the cleaner outlet. How Do I Identify The Fuel Inlet Hose And Return Hose? Generally, the inlet hose is larger and the return hose is smaller. A filter is often connected on the inlet hose side, while a buffer is often on the return side. Some hoses also have arrows showing fuel flow direction. What Should I Do If The Vehicle Has No Fuel Return Hose? If there is no return hose, remove the fuel pump fuse or disconnect the power cable of the fuel pump so the pump will not work during cleaning. Use the correct stopper or adapter according to the vehicle fuel system layout. What Should I Check Before Starting The Engine? Check every connection point and make sure there is no leakage. Keep a fire extinguisher nearby, lead exhaust outdoors, place the transmission in neutral, apply the brake, and stop the engine immediately if any fuel leak is found. Do I Need To Initialize The Throttle After Cleaning? The manual warns that the throttle position sensor must be initialized with an automotive scan tool after throttle cleaning. Otherwise, the fault indicator lamp may turn on and the PCM may record a DTC. What Accessories Are Included With AUTOOL C100? Refer to the Packing List image for final package contents. The kit image shows the C100 cleaner body, pressure gauge, regulating valve, universal hose quick coupling, leader air hose, universal fast connector, vehicle adapters, TWC cleaning joints, throttle cleaning nozzle, addition funnel, hose clamps, return pipe clip, thread plug, hose plug, and related accessories. How Long Is The Warranty? The manual states that the main unit has a three-year warranty from the date of receipt, and included accessories are covered by a one-year warranty. Warranty handling depends on the actual breakdown situation and does not cover damage caused by misuse, unauthorized modification, or failure to follow the instructions.Related GuidesRelated GuidesUse these related articles to compare product choices, maintenance workflows, and AUTOOL tool applications before ordering. Guide / 12-10-2025See These Signs? Your Fuel Injectors Are Clean!Why is it necessary to assess the effectiveness of fuel injector cleaning? Fuel injector cleaning affects power, fuel efficiency, idle, and emissions; learn. Guide / 10-10-2025Comparison Guide: CT500 vs FN608 Fuel Injector Cleaner & TesterThe fuel injector is the “heart” of the engine’s fuel system. It precisely sprays atomized fuel into the cylinders to ensure complete combustion and smooth power. Guide / 03-14-2025AUTOOL CT450 VS CT400 Which Fuel Injector Tester Is Better?As the demand for efficient automotive repair tools in workshops continues to increase, the fuel injector tester has become an indispensable device. For workshops or. Guide / 04-30-2025Popular Fuel Injector Tester of 2025Do you know which fuel injector tester are the most popular in 2025? Recent data shows that AUTOOL has stood out in the 2025 automotive maintenance tools market.Warranty And ContactWarranty And ContactFor C100 vehicle compatibility, adapter fitment, EFI connection, no-return-hose setup, throttle cleaning, TWC flushing, pressure settings, package contents, manual instructions, or after-sales support, contact AUTOOL Store directly.Pre-Sales And Product SupportUse support if you need help confirming whether C100 is suitable for your petrol vehicle, which adapter to use, how to connect the inlet and return hoses, what pressure to set, or how to follow the manual safely.Petrol EFI vehicle compatibility and adapter confirmationEFI fuel system cleaning setup and pressure guidanceThrottle style cleaning and low-pressure setup explanationNo-return-hose connection and fuel pump fuse guidanceTWC, intake manifold, throttle body, and exhaust pipe flushing questionsPacking List and accessory confirmation3-year main unit warranty and 1-year accessory warranty support according to the manual Email Support[email protected] WhatsApp Support 86 189 2647 7404