MR CARTOOL Fuel Injector Tester for GDI/FSI/EFI — 8-Mode 5V/12V Dual-Channel Diagnostic & Cleaner Kit

This compact tester combines a digital pulse generator with cleaning adapters and twin output channels so you can simulate engine conditions, compare injector performance and run ultrasonic or pressure cleaning cycles without removing the entire fuel rail. It’s built for DIY mechanics and professional workshops who need a fast, visual way to verify injector health and measure relative flow and spray characteristics across common injector types.

How does the tester reveal clogged, leaking, or damaged injectors?

The unit creates repeatable electrical pulses while supplying selectable 5V or 12V drive, letting you observe spray patterns, listen for irregular operation and measure relative injection quantity. Its LCD displays the active pulse mode so you can reproduce test conditions and compare injectors side-by-side.

• Eight pulse modes simulate different engine RPM/load scenarios for realistic testing.
• Two simultaneous output channels let you test two injectors at once for direct comparison.
• Visible spray and audible feedback help identify dribbling, asymmetric spray, or no-spray failures.
• 12V/5V selection accommodates modern and legacy injector drive circuits safely.

What connectors and accessories are included to fit various engines?

The kit ships with six nozzle adapters that cover the majority of car and motorcycle injectors, enabling quick connections to common petrol injector shapes and sizes. Adapters allow you to attach the tester to injectors or to a fuel pressure/cleaning rig without custom fittings.

• Six different nozzles to fit MPFI, TBI, CFI, GDI-adjacent styles and many motorcycle injectors.
• Leads and clips to power the unit and make secure electrical contact to injector pins.
• Dual output terminals for parallel testing or faster diagnostics.
• Compact case for organized storage and transport between jobs.

Can it help when cleaning injectors and verifying improved performance?

Yes — the tester’s pulse modes reproduce varying duty cycles so you can run cleaning solutions or ultrasonic baths while actively cycling injectors. After cleaning, repeat tests to confirm improved spray symmetry and increased flow consistency across cylinders.

• Use pulse patterns to mimic idle, cruise, and high-load injection to flush deposits under realistic conditions.
• Switch between 5V and 12V to match bench cleaning setups and injector drive requirements.
• Monitor before-and-after spray characteristics to quantify cleaning effectiveness.
• Stop button prevents changing modes while running, protecting injectors and the rig.

Who this tool is for: technicians, home mechanics and motorcycle owners who service petrol engines and want a reliable way to diagnose injector faults, confirm cleaning results, or validate injector replacements without full engine teardown. It suits shops that need repeatable tests, fleets needing quick injector checks, and hobbyists who perform their own maintenance. The kit’s versatility across GDI/FSI/EFI and common injector families makes it a practical bench and field tool. MR CARTOOL includes a 90-day warranty and responsive customer support for setup questions or troubleshooting.