AUTOOL CT400 Fuel Injector Cleaning Tester with GDI Test

AUTOOL CT400 Fuel Injector Cleaning Tester adopts the latest unique GDI injector driving technology, which can drive 12V, 70V, and 120V high-voltage injectors. When unsure about the injector’s voltage type, you don’t need to worry about damaging the nozzle. The CT400 will intelligently determine the necessary driving voltage for the GDI injector. If the voltage is selected incorrectly, there will be no fuel injection or alarm. It is your first choice of equipment for automotive service and repair. How To Choose Test Fluid And Cleaning Fluid? Test Fluid: This colorless, odorless, non-corrosive liquid checks injector performance and simulates working conditions. For best results, use professional test fluid, or if unavailable, medical alcohol (75% alcohol content) as an alternative. Cleaning Fluid: Removes deposits from injectors and is typically corrosive and flammable. Use professional ultrasonic cleaning fluid for the best results. If unavailable, medical alcohol (75% alcohol) can be used but may be less effective. Warm Tips For ultrasonic cleaning fluid, please use professional engine carbon cleaning fluid. Please use professional injector test fluid, do not use corrosive cleaning fluid, cleaning fluid will damage the equipment, if the equipment is damaged because you use the cleaning fluid when testing the injector, you need to bear the repair costs. Before using the ultrasonic cleaning function, add the carbon cleaning fluid first. Do not run the equipment without adding the fluid, as it may damage the ultrasonic motherboard. When you test a single injector you simply need to plug only the other 5 cylinders, so the CT400 comes with five plugs. AUTOOL CT400 Manual Download What is the Difference Between the AUTOOL Fuel Injector Cleaner & Tester Machine? FAQs Comparison: AUTOOL FN608 vs FN606 car injector cleaner machine  1. Cylinder Testing Capacity The FN608 supports testing for 8 cylinders, while the FN606 supports testing for 6 cylinders. 2. Pump Configuration The FN608 is equipped with two independent fuel pumps, each corresponding to a separate fuel rail (left and right). Both pumps operate independently during testing — if one pump fails (e.g., the left pump), only the corresponding fuel rail is affected, while the other continues to function normally. This dual-pump system ensures greater reliability and uninterrupted testing. The FN606, on the other hand, has a single fuel pump, meaning that if it fails, the entire system stops working until the pump is replaced. Comparison: AUTOOL FN608 vs CT500 fuel injector tester  1. Cylinder Testing Capacity The FN608 supports testing for 8 cylinders, while the CT500 supports testing for 6 cylinders. This makes the FN608 more suitable for high-capacity or multi-cylinder engine injectors. 2. Heating Function The FN608 features a heating cleaning tank capable of maintaining a constant temperature up to 50°C, which significantly improves cleaning efficiency and performance. In contrast, the CT500 does not support heating, offering a more basic cleaning function. 3. Voltage Settings The FN608 supports multiple voltage ranges — 12V, 12–70V, and 120–180V — making it compatible with a wider variety of injector types. The CT500, however, supports only 12V, 70V, and 120V, providing more limited voltage adaptability. 4. Cleaning Tank Design The FN608’s cleaning tank can be used independently or together with the main unit, providing greater flexibility for maintenance and cleaning. The CT500’s cleaning tank is integrated with the main body and cannot be used separately, limiting its independent operation. 5. Pump Configuration The FN608 is equipped with two independent fuel pumps, each corresponding to a separate fuel rail (left and right). Both pumps operate independently during testing — if one pump fails (e.g., the left pump), only the corresponding fuel rail is affected, while the other continues to function normally. This dual-pump system ensures greater reliability and uninterrupted testing. The CT500, on the other hand, has a single fuel pump, meaning that if it fails, the entire system stops working until the pump is replaced. Comparison: AUTOOL CT400 vs CT450 vs CT500 injector cleaning machine 1. Testing Functions: The CT450 adds the Pulse Injection Test compared to the CT400, while the CT500 further adds Wide Pulse Injection Test and Continuous Injection Test compared to the CT450, offering more advanced and versatile injector testing capabilities. 2. Cleaning & Heating Function: The CT450 features ultrasonic cleaning with heating up to 50°C, whereas the CT400 and CT500 do not have a heating function, making CT450 more effective for thorough injector cleaning. Comparison: AUTOOL CT200 vs CT400 fuel injector cleaner machine 1. Supported Injector Types CT200 only supports 12V standard fuel injectors, whereas CT400 supports both 12V standard and GDI (Gasoline Direct Injection) injectors, making it compatible with a wider range of injector types and vehicles. 2. Accessory Storage Design CT200 does not have dedicated accessory storage, while CT400 features a drawer for injector adapters and other accessories, providing more convenient organization and storage. Comparison: AUTOOL CT150 vs CT160 vs CT200 ultrasonic fuel injector cleaner Both the CT150 and CT160 are designed for cleaning and testing fuel injectors of 4-cylinder gasoline engines. The main difference is that the CT160 is equipped with an ultrasonic heating function, while the CT150 does not have this feature. Compared with the CT150, the CT200 simply adds two more testing cylinders (6 in total), while the other functions remain the same. If you only need a tester for 12V gasoline fuel injectors, the CT160 is an excellent choice. However, if you need to test GDI (Gasoline Direct Injection) high-pressure injectors, we recommend choosing CT400, CT450, CT500, FN606, or FN608 for better compatibility and performance. AUTOOL Fuel Injector Cleaner and Tester Quick Search AUTOOL CT80 Ultrasonic Cleaning Machine $99.00 AUTOOL CT150 Fuel Injector Tester and Cleaner Machine $259.00 -35% AUTOOL CT160 Fuel Injector Tester & Heating Ultrasonic Cleaner Machine $379.00 Original price was: $379.00.$245.00Current price is: $245.00. AUTOOL CT200 Injector Ultrasonic Cleaner & Tester $319.00 -18% AUTOOL CT500 GDI EFI FSI Fuel Injector Cleaner and Tester $769.00 Original price was: $769.00.$629.00Current price is: $629.00. Fuel Injector Cleaner & Tester Machine Parts $1.00 – $89.90 AUTOOL CT60 Fuel Injector Signal Generator Fuel Injector Super Pulse Signal Tester $69.90 Autool Original Volumetric Flasks Glass Tube for Fuel Injector Cleaner and Tester $10.00 AUTOOL C80 Auto Injector Cleaner Non-Dismantle Auto Fuel Injector Cleaner $109.00 Why Need AUTOOL CT400 Fuel Injector Cleaning Tester? Injector performance is crucial for engine function. Carbon buildup from combustion can lead to injector failures and increased wear on cylinder walls and piston rings, resulting in unstable idling, higher fuel consumption, poor acceleration, starting problems, and potential engine damage. AUTOOL CT400 GDI Fuel Injector Cleaner & Tester Machine Feature For GDI Injector Cleaning and Testing:AUTOOL CT400 employs advanced GDI injector drive technology to clean and test both standard and GDI injectors, compatible with brands like Mercedes-Benz, BMW, Audi, and Porsche. Its 6-cylinder design enables simultaneous testing of multiple injectors. Advanced Ultrasonic Cleaning Technology: Stable oil pressure, wide adjustable range. Strong cleaning capacity, large capacity of cleaning cylinder, can clean several injectors at the same time. Multi-voltage selection: The CT400 6 Cylinder Injector Nozzle Cleaning Tester offers adjustable voltage outputs (12V, 70V, 120V) for different injectors. It smartly identifies the necessary driving voltage for GDI injectors to prevent damage from incorrect settings while avoiding oil injection or alarm signals. Support Car Model:  Support for major automakers: Audi, Benz, BMW, Chevrolet, Chrysler, Fiat, GM, Honda, Hyundai, Jaguar, Kia, Mazda, Mitsubishi, Nissan, Opel, Peugeot, Porsche, Renault, Saab, Toyota, and more. Intelligent Design:  The device features a high-definition digital control panel for easy operation. A bright LED backlight lets you monitor the injector’s working conditions. It also includes a test fluid drain valve for clear observation and recycling of the test fluid. Three-Year Warranty and Lifelong Maintenance: AUTOOL will replace parts free of charge for damages due to non-human factors within three years. For inquiries, please contact us; we aim to respond within 24 hours. AUTOOL CT400 GDI Fuel Injector Cleaner & Tester Machine Functions Ultrasonic cleaning: It sends signals to the injectors through the pulse signal line, using the cleaning fluid with ultrasonic vibration to completely remove the carbon and impurities inside the injectors. Idle speed test (0-20ms): Simulate the engine idling speed and test the state of the fuel injector. Medium speed test (0-7.5ms): simulate the engine running at medium speed and test the state of the fuel injector. High-speed test (0-4ms): Simulate the high-speed performance of the engine and test the state of the fuel injector. Acceleration test: Simulate the acceleration state of the car and test the performance of the fuel injector. Shift speed test: Simulate the shifting state of the car and test the working performance of the fuel injector. Leakage test: Test the sealing condition of the fuel injector. Idle speed sprayability Test: Simulate the engine idling state and test the spraying performance of the fuel injector. Medium-speed sprayability test: Simulate the engine’s medium-speed state and test the spraying performance of the fuel injector. High-speed sprayability test: Simulate the high-speed state of the engine and test the spraying performance of the fuel injector. Reverse flush: Reverse flush is a way to clean the injectors with the test liquid flowing from the outlet to the inlet of the injector. Reverse flush may remove the dirt inside the injector or the injector Strainer (Only for the top fuel supply injector). No-disassembly cleaning: Direct cleaning without disassembling the injectors, this function is an additional function, that requires special adapters. Online Support Packing List FAQs Can diesel injectors be cleaned and tested by using AUTOOL CT series products? AUTOOL CT series products can clean diesel injectors, but not test. How to choose test fluid? The test fluid evaluates fuel injector performance. It’s a colorless, odorless, non-corrosive liquid that simulates different injector working states. For optimal results, use a professional automotive injector test fluid. If unavailable, medical alcohol with over 75% alcohol content can be used instead. How to choose cleaning fluid? To clean carbon deposits on fuel injectors, use a highly corrosive and flammable cleaning fluid. For optimal results, choose a professional ultrasonic cleaning fluid. If unavailable, 75% medical alcohol can be used as a substitute, though its effectiveness may vary. Can I use cleaning liquid to test the injectors? Not! The cleaning liquid is corrosive and may damage internal machine components, corrode rubber, and cause leaks. How do I set test parameters? You don’t need special settings. You need to set the number for the function and set the test time. The testing process is simple and easy to use. How to select the correct voltage when using CT400 to test GDI injectors? Select the voltage according to the injectors. Gradually increase the voltage from 12V, 70V to 120V until the injectors function correctly. When testing GDI injectors with CT400, will the wrong voltage damage the injectors? In the short term, the wrong voltage won’t cause damage. However, do not apply the wrong high voltage to the injectors for a long time. If the injector does not work properly, please adjust it to the correct voltage in time.