FOXWELL JT400 Fuel Injector Cleaner Tester 4-Cylinder Ultrasonic

FOXWELL JT400 Professional Fuel Injector Cleaner & Tester

Restore Engine Performance Without Replacing Expensive Injectors

• Poor fuel economy, rough idling, difficult starting and engine misfires are often caused by dirty or faulty fuel injectors rather than damaged engine components. Replacing injectors can be costly, but in many cases a professional cleaning and inspection is all that's needed to restore performance.

• The FOXWELL JT400 Fuel Injector Cleaner & Tester is an all-in-one professional injector service machine that combines ultrasonic cleaning, injector testing, fuel system cleaning and engine simulation into one powerful solution. Whether you're running a professional workshop or maintaining your own vehicles, the JT400 helps diagnose injector problems accurately, remove stubborn carbon deposits and restore injector efficiency while reducing unnecessary replacement costs.

• Designed for daily workshop use, the JT400 supports 99% of petrol fuel injectors, including EFI and GDI injectors, and provides reliable cleaning and testing for a wide range of vehicles. (Diesel injectors support ultrasonic cleaning only and cannot be electronically tested.)nal Fuel Injector Cleaner & Tester

Save Money by Testing Before Replacing

• Fuel injectors are one of the most commonly replaced engine components, but many injectors fail because of carbon build-up, poor atomization or minor leakage rather than permanent damage.
• The FOXWELL JT400 allows you to inspect every injector before making expensive repair decisions. By identifying injectors that simply require cleaning instead of replacement, you can significantly reduce maintenance costs while improving engine performance and fuel economy.

Benefits include:

• Reduce unnecessary injector replacement
• Improve fuel efficiency
• Restore smooth engine operation
• Reduce engine vibration and hesitation
• Improve throttle response
• Lower vehicle maintenance costs

Perfect for independent workshops, fleet maintenance, motorcycle repair shops and DIY mechanics who want professional results without paying dealership prices.

Professional Injector Testing with Accurate Diagnostics

Simply cleaning an injector isn't always enough. Before servicing, it's important to understand exactly how each injector performs. The JT400 provides multiple professional testing modes that simulate real engine operating conditions, allowing you to identify injector faults quickly and accurately.Injector

Resistance Test

• Quickly measures injector coil resistance to detect damaged or faulty injector solenoids before installation or cleaning.

Flow Uniformity Test

Compares fuel delivery from all four injectors under identical conditions.

• Uneven fuel flow often causes rough idle, poor acceleration and unstable engine performance. The JT400 allows you to identify injectors that deliver too much or too little fuel.

Spray Pattern Test

A proper spray pattern ensures efficient combustion.

• The transparent measuring cylinders allow you to visually compare atomization between injectors, helping identify clogged nozzles or poor spray quality that can increase fuel consumption and reduce engine power.

Leakage Test

Tests injector sealing performance under operating pressure.

• Even a small injector leak can cause hard starting, excessive fuel consumption, black smoke and poor emissions. The JT400 helps detect leaking injectors before they become serious problems.

Injection Volume Test

• Measures injector fuel delivery within a specified time to determine whether the injector meets factory performance standards.

Variable Speed Simulation

• Simulates engine speeds from 100 RPM to 9900 RPM, allowing injectors to be tested under idle, cruising and high-speed operating conditions for more accurate diagnostics.

Automatic Test Mode

• The built-in automatic program performs multiple injector tests in sequence, saving valuable workshop time while ensuring consistent testing procedures.

Deep Ultrasonic Cleaning for Maximum Injector Performance

• Carbon deposits gradually build up inside fuel injectors over time, restricting fuel flow and affecting engine efficiency.
• The JT400 uses professional ultrasonic cleaning technology to remove stubborn carbon deposits from both the inside and outside of the injector without damaging delicate internal components.
• The powerful ultrasonic cleaning system restores injector performance by removing contamination that traditional cleaning methods often leave behind.

Key advantages include:

• Deep internal cleaning
• Removes carbon deposits
• Restores fuel atomization
• Improves combustion efficiency
• Supports single or multiple injector cleaning
• Safe for regular injector maintenance

The generous 3-litre cleaning tank allows multiple injectors to be cleaned simultaneously, increasing workshop productivity while reducing servicing time.

Clean the Entire Fuel System Without Removing Components

The JT400 isn't limited to bench testing.

Its On-Vehicle Cleaning function allows technicians to clean the vehicle's fuel delivery system without removing injectors from the engine.

This function helps remove deposits from:

• Fuel injectors
• Fuel rails
• Fuel supply lines
• Combustion chambers
• Fuel delivery system

On-vehicle cleaning is ideal for preventative maintenance and can significantly reduce labour time compared with complete injector removal.

Designed for Professional Workshops

Built for daily commercial use, the JT400 combines durable construction with precise electronic control to deliver consistent testing results.

Professional specifications include:

• 4-inch LCD Display
• Intelligent Microcomputer Control
• Real-Time Digital Monitoring
• Adjustable Fuel Pressure (0-8 Bar)
• Pulse Width: 0.5-25 ms
• Engine Speed Simulation: 100-9900 RPM
• 300W Maximum Power
• 60W Ultrasonic Cleaning Power
• High Precision Resistance Measurement (0.1 )
• 3L Fuel Tank Capacity

The integrated database also provides reference fuel pressure information for various vehicle models, making servicing faster and more convenient.

Wide Vehicle Compatibility

The FOXWELL JT400 is designed to service a wide range of petrol vehicles commonly found in South Africa.

Compatible with:

• Passenger Cars
• SUVs
• Bakkies
• Motorcycles
• Light Commercial Vehicles

Supports:

• EFI Injectors
• GDI Injectors
• Top Feed Injectors
• Most Standard Petrol Injectors

Important Note

Diesel injectors are supported for ultrasonic cleaning only. Electronic injector testing is designed for petrol injectors.

Why Choose the FOXWELL JT400?

The JT400 combines professional injector diagnostics and ultrasonic cleaning in one reliable machine, making it an excellent choice for workshops and serious DIY mechanics alike.

• Professional Fuel Injector Cleaner & Tester
• Powerful Ultrasonic Carbon Cleaning
• Multiple Injector Testing Modes
• Real-Time Digital Monitoring
• Automatic & Manual Test Programs
• On-Vehicle Fuel System Cleaning
• Large 3L Cleaning Tank
• Wide Compatibility with EFI & GDI Injectors
• Easy-to-Operate LCD Interface
• Built for Workshops & Home Garages

Whether you're diagnosing injector faults, restoring spray performance or carrying out routine fuel system maintenance, the FOXWELL JT400 provides an efficient, accurate and cost-effective solution that helps keep vehicles running at their best while reducing unnecessary repair costs.

Important Information

• Supports cleaning and testing for approximately 99% of petrol fuel injectors.
• Diesel injectors can be ultrasonically cleaned but are not supported for electronic testing.
• Compatible with AC110V or AC220V power (model dependent).
• Cleaning and test fluids can be recycled, helping reduce long-term operating costs.
• Backed by FOXWELL professional customer support for technical assistance and after-sales service.

What's in the box
1 x Main unit:1 set
1 x Ultrasonic cleaner cover:1 pcs
1 x Injector cleaning bracket:1 pcs
1 x Fuel distributor package:1 set
1 x 4-cylinder pulse signal cables:1 set
1 x Pulse signal connection cable1:4 pcs
1 x Pulse signal connection cable3:4 pcs
1 x Pulse signal connection cable4:4 pcs
1 x Adaptor 1 for fuel top-supply injector:4 pcs
1 x Coarse thread adaptor for fuel top-supply injector:4 pcs
1 x Swiss thread adaptor for fuel top-supply injector:4 pcs
1 x Hexangular stopper:3 pcs
1 x Adjusting pole(H80):1 pcs
1 x Knurled nut:1 pcs
1 x Pressing screw:1 pcs
1 x Adaptor for GDI injector(D16):4 pcs
1 x Top Oil Supply Connector(D17.5):4 pcs
1 x Tool box:1 pcs
1 x Oil outlet adapter:1 pcs
1 x Power cable:1 pcs
1 x Oring 9.72.65:10 pcs
1 x User's manual:1 pcs