Dirty fuel injectors are one of the most common causes of power loss, increased fuel consumption and rough engine running – and a recurring diagnostic topic in every independent workshop. Anyone who outsources every test and cleaning job to an external service provider ends up paying more in the long run and loses customers to competitors with their own test bench. With your own fuel injector tester, spray pattern, flow rate and tightness can be checked and cleaned directly in your own workshop – the only question is which of the three AUTOOL models CT160, CT200 or CT400 fits your workload and customer base.
How important is ultrasonic cleaning for injector testing?
Ultrasonic cleaning is the decisive criterion because it loosens deposits and coking from the fine injector channels without mechanically damaging the sensitive components. High-frequency sound waves create microscopic cavitation that reaches even hard-to-access areas inside the injector – something that isn't possible with conventional cleaning agents or purely mechanical methods.
All three AUTOOL models rely on this technology, though with different power levels: the AUTOOL CT160 works with 70 watts of ultrasonic power, the AUTOOL CT200 also with 70 watts, while the AUTOOL CT400 offers material-friendly cleaning at 60 watts and 28 kHz specifically tuned for modern GDI systems. This finer tuning pays off especially with direct injectors, since even the smallest deposits there change the spray pattern and reduce performance and emissions quality.
How many injectors should a tester be able to check at once?
For a workshop with a typical customer mix, a device that reliably tests and cleans individual injectors is enough to start with – but for daily use on multi-cylinder engines, a device that tests several injectors simultaneously noticeably saves time. The AUTOOL CT160 is designed as a compact test and cleaning device for individual petrol and motorcycle injectors, making it especially suitable for getting started and for spot diagnostics.
The AUTOOL CT200, on the other hand, is designed as a professional 6-cylinder tester: several injectors can be tested at the same time, and differences in flow rate become immediately visible. The AUTOOL CT400 goes one step further with six included adapter sets (cone adapters, BMW special adapter, 16 mm adapter, adapter cable) and is specifically designed for the simultaneous testing of up to six GDI and standard injectors in workshops with high workloads.
Which engine types and vehicle brands are supported?
All three devices cover the common petrol injection systems of the major vehicle brands, but differ in their focus on classic injection or modern direct injection (GDI). The AUTOOL CT160 supports numerous electronic injection systems on brands such as Audi, BMW, Mercedes-Benz, VW, Toyota, Honda, Suzuki or Yamaha – including motorcycle adapter pieces for two-wheeler workshops.
The AUTOOL CT200 is designed for the same brands (including Audi, BMW, Mercedes-Benz, Volkswagen, Honda, Hyundai, Nissan, Ford, Yamaha, Suzuki) and is clearly aimed at classic multi-point injection systems. The AUTOOL CT400 is additionally approved for GDI direct injection systems and comes with its own BMW special adapter for that purpose. The specific compatibility of all three devices always depends on the respective injection system and the matching adapters – all three devices are pure test and cleaning devices for fuel injectors, not a diagnostic scanner for control units.
Which fuel injector tester is best?
The best fuel injector tester for most workshops with a mixed petrol customer base is the AUTOOL CT200, because as a 6-cylinder tester it tests several injectors simultaneously, checks flow rate and spray pattern under realistically simulated engine speeds (0–7,500 rpm), and at €699.00 offers a balanced ratio of functionality and price. For workshops with a different focus, however, a different model may be the better choice:
- Getting started and spot testing (including motorcycles): The AUTOOL CT160 (€549.00) is enough for workshops that want to test and clean injectors individually without investing in a complete test bench system.
- Regular testing of several petrol injectors: The AUTOOL CT200 (€699.00) covers most classic diagnostic and maintenance work with its 6-cylinder design, adjustable system pressure (0–0.6 MPa) and Siemens pump.
- GDI direct injectors and high workloads: The AUTOOL CT400 (€899.00) is the right choice for workshops that regularly test modern direct injection systems and want to work on up to six injectors simultaneously, including brand-specific adapters.
Buy now, pay later is available for all three devices via Klarna or PayPal – making it easy to fit the purchase into your workshop budget.
Comparison table: Which model suits your area of use?
| Area of use | Recommendation | Price |
|---|---|---|
| Individual testing & cleaning, including motorcycles, entry-level price | AUTOOL CT160 | €549.00 |
| Several petrol injectors at once, 6-cylinder test bench | AUTOOL CT200 | €699.00 |
| GDI/direct injectors, 6 injectors at once, premium equipment | AUTOOL CT400 | €899.00 |
The three AUTOOL fuel injector testers in detail
AUTOOL CT160 Fuel Injector Tester with Ultrasonic Cleaning for Workshops
The entry point into professional injector testing: ultrasonic cleaning at 70 watts, testing of spray pattern, flow rate, tightness and electrical resistance – compact, robust and with motorcycle adapters for €549.00. 
AUTOOL CT200 Fuel Injector Tester for Petrol Engines with Ultrasonic Cleaning
The balanced mid-range model: 6-cylinder tester with ultrasonic cleaning, adjustable system pressure and Siemens pump for consistent test conditions on petrol injection systems – for €699.00. 
AUTOOL CT400 GDI Fuel Injector Cleaner Tester for 6-Cylinder Workshops
The premium solution for GDI direct injectors: simultaneous testing of up to 6 injectors including cone, BMW and 16 mm adapters, material-friendly 60-watt ultrasonic cleaning at 28 kHz – for €899.00. 
Whether you're getting started, handling daily workshop work or specializing in GDI: with the AUTOOL CT160, CT200 or CT400, injectors can be tested and cleaned directly in your own workshop instead of sending them out for expensive external testing – this saves time, makes you independent of external service providers and creates an additional diagnostic and cleaning service for your customers. If you have questions about choosing the right device, our team will be happy to advise you personally at 0711-3654 4645. Buy now, pay later is available via Klarna or PayPal.