What chemicals are needed to operate ASNU machines?

Two chemicals are required for ASNU machines: a calibration fluid (a Stoddard Solvent with the viscosity of gasoline without the flammability) for flow and leak tests, and a water-based biodegradable chemical for ultrasonic tank cleaning.

What is the warranty on ASNU machines?

ASNU machines come with a one-year parts warranty.

Can I hook my computer up to an ASNU machine?

Yes, an optional software program allows you to interface your laptop or PC with ASNU machines to set parameters like MS pulses, simulated RPM, and the number of pulses. However, ASNU machines do not provide data to the computer for printing.

How do I use an ASNU machine to adjust the flow rate of an injector?

ASNU machines restore injectors to 100% of their original flow rate. To alter the flow rate, you would need to disassemble the injector and modify its components, which requires specialized equipment typically available only to manufacturers.

How do I use a diagnostic machine to supply a matched set of injectors?

ASNU machines restore injectors to their original flow rates, which can vary by 1% to 4%. Matching injectors requires grouping those with the closest flow rates from multiple sets.

Do ASNU machines test diesel injectors?

No, ASNU machines do not test diesel injectors.

Will ASNU machines test all top feed and side feed gasoline injectors?

Yes, ASNU machines can test all top feed and side feed gasoline injectors, including those used in automotive, marine, and motorcycle applications. Additional adapters are available for specific side feed injectors.

Where can I find components to recondition injectors?

Ace Fuel Systems supplies approximately 300 part numbers for injector reconditioning, including filters, insulator washers, and pintle caps, which are often unavailable from OEM suppliers.

Do ASNU machines test performance injectors?

Yes, the ASNU machines distributed in the U.S. feature a high-performance pump with twice the volume and pressure capability of the standard pump, making them suitable for testing performance injectors.

Does an ASNU machine test direct injectors at vehicle operating pressure?

No, ASNU machines test direct injectors at lower pressures to evaluate spray patterns and atomization effectively while maintaining a safer and more cost-efficient testing environment.

ASNU Injector Diagnostics | Performance Fuel Injectors

Optimize Fuel Injector Performance with ASNU Injector Diagnostics

Fuel injectors play a vital role in engine efficiency – but over time, wear, clogging, or calibration issues can lead to poor fuel flow, inconsistent spray patterns, and decreased performance. Without the correct tools, diagnosing and identifying these problems can be difficult and will likely mean costly repairs or replacements.

That’s where ASNU injector diagnostic machines from Ace Fuel Systems come in. As the industry gold standard since 1990, ASNU machines are well-known globally for their precision and reliability.

Whether you’re in the automotive, marine, or industrial sector, ASNU systems identify inefficiencies and provide solutions. Diagnose and restore performance with unmatched accuracy – discover how Ace Fuel Systems can equip you with ASNU injector diagnostics to enhance your capabilities and deliver reliable results for clients.

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What Sets ASNU Machines Apart?

Most fuel injector diagnostic systems fall short. From inadequate cleaning methods to a lack of simulating real-world operating conditions, many machines leave testing gaps that compromise performance.

You deserve better – and ASNU injector diagnostics technology is your all-in-one solution.

ASNU machines stand out, offering features no other system can match:

Integrated Ultrasonic Cleaning: The first and only diagnostic machine (that we know of!) with a dedicated ultrasonic tank that cleans while actively pulsing
Peak/Hold Simulation Software: An optional software providing the ability to drive injectors at any peak or hold current and simulated RPM for testing accuracy
E-Tec and Fitch Injector Support: Specialized equipment for testing and servicing unique injector types
Variable Voltage Simulation: An optional add-on that replicates how fluctuating input voltage affects fuel delivery

ASNU’s high-performance testing capabilities guarantee precise spray pattern and flow rate analysis. As a result, professionals like you can provide quality injector servicing and stay ahead of the competition.

Tailored Solutions for Every Market

Fuel injectors aren’t one-size-fits-all. Whether it’s automotive, high-performance racing, or marine, every market faces different challenges when servicing injectors.

While standardized tools often fail to meet specific demands, ASNU’s range of injector diagnostic systems meets the needs of various industries. As the leading authorized distributor of ASNU machines, Ace Fuel Systems can supply the tools you need to diagnose and service fuel injection systems accurately.

Aftermarket Service and Repair Workshops
Fuel Injection Specialist Workshops
Racing Engine Builders
High-Performance Tuning Shops
OEM Dealerships
Motorcycle Performance and Racing Specialists
Motorcycle Service & Repair Workshops
Marine Racing Performance and Racing Specialists
Marine Service and Repair Workshops

Whatever your specialty, you can be confident that an ASNU system will address the challenges you face head-on.

Explore ASNU Injector Machines

ASNU Classic GDI – Test and service up to 8 injectors at one time, including direct injection injectors
ASNU Junior – Test and service up to 6 injectors at one time
2 Stroke GDI Marine Adapter Box – Driver box specifically designed to drive E-TEC & Ficht GDI injectors
ASNU GDI/FSI Adapter Box – Provides the ability to update most analog ASNU fuel injector machines to GDI digital capabilities

Piezo Adapter Box – Adapter to Classic GDI Machine that allows for testing of Piezo high-performing injectors, where maintenance is even more critical

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Fuel Injector Diagnostics FAQs

What chemicals are needed to operate ASNU machines?

Two chemicals are required for ASNU machines. The calibration fluid – a Stoddard Solvent with the same viscosity that specifies the gravity of gasoline (without the flammability) – conducts flow and leak tests. Additionally, a water-based (biodegradable) chemical resides in the ultrasonic tank for injector cleaning.
What is the warranty?
Can I hook my computer up to an ASNU machine?

An optional software program allows you to interface your laptop or PC to ASNU to set different parameters (MS pulses, simulated RPM, or the number of pulses). You can also use any downloaded data acquisition information to drive the injectors. The software lets you drive the machine functions, but ASNU won’t provide the computer with any information for printing.
How do I use an ASNU machine to adjust the flow rate of an injector?

The machine will only bring the injector back to 100% of its original flow rate. Changing the flow rate from the original manufacturer would require disassembling the injector and updating the orifice and pintle size or lifting the pintle off of the seat. Since injectors are manufactured to microns of tolerance, specialized equipment is required for assembly, which is usually only available from manufacturers.
How do I use a diagnostic machine to supply a “matched” set of injectors?

Since the machine brings injectors back to 100% of the original flow rate, and manufacturers allow from 1% to 4% deviation, you may have eight injectors with a 4% deviation in flow between the highest and lowest flowing. Ensuring the same flow rate across all eight would require grouping multiple injectors.
Do ASNU machines test diesel injectors?
Will ASNU test all top feed and side feed gasoline injectors?

ASNU can check all top feed and side feed injectors currently being installed on automobile, marine, and motorcycle applications, thanks to the additional GDI capabilities. The machines come with adapters to test the top feed injectors.

Side feed adapters are available for all currently known side feed injectors. We at Ace Fuel Systems manufacture adapters for new side feed applications and add them to the catalog before the life cycle requires servicing.
Where do I access the components to recondition injectors?
Do ASNU machines test performance injectors?
Where can I find information on the flow rate, spray pattern, and other specifications for the injectors I’m testing?

The original equipment suppliers are reluctant to provide information on their injectors because they test under hard-to-replicate conditions. The variables would cause any information to be invalid in their eyes.

ASNU is meant to be a comparator of one part number or all of the injectors from one engine to verify the spray patterns, flow volume, and coil resistance matched to the allowable factory tolerances (in the case of flow rates 2% – 4%). Many of our customers build a database of specific part number parameters utilizing their own testing procedures that they can duplicate each time with the ASNU equipment.
Does an ASNU machine have the ability to check direct injectors at vehicle operating pressure?

ASNU doesn’t believe examining direct injectors at higher pressure will provide conclusive results of fuel distribution because of the inability to view fuel particles at high pressure. By evaluating injector coil condition with inductance readings and evaluating spray patterns and atomization at low pressure to view for consistency, ASNU, with the help of injector manufacturers, has determined low-pressure testing is most advantageous. Testing at lower pressure also keeps the machine cost down and provides a safer environment.

Improve Fuel Injector Performance & Customer Satisfaction with Ace Fuel Systems

Injector issues don’t have to slow you down. Partner with Ace Fuel Systems and gain access to ASNU’s cutting-edge technology.

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