MR CARTOOL Fuel Injector Tester 5V/12V 8-Mode Kit — Dual Output, LCD Display

MR CARTOOL Fuel Injector Tester is a handheld 8-mode pulse cleaner and diagnostic kit that simulates engine signals, tests injector operation, and helps clean or identify faulty GDI/FSI/EFI injectors.

This compact tester combines selectable 5V/12V outputs, four pulse-output channels and six nozzle adaptors to inspect, pulse-clean, and compare injectors from most gasoline engines and motorcycles. The LCD shows active pulse mode and status, while dual pulse outputs let you run two injectors simultaneously for faster diagnostics. The unit is designed for DIY mechanics and professional shops who need a portable way to verify spray pattern, leak, pulse response and relative flow.

How does the tester reveal a clogged or leaking injector?

By delivering controlled electrical pulses and observing spray patterns and volume, the device exposes common injector faults such as blockages, drips or stuck pintles. Use the included adaptors and a fuel pressure source or cleaning fluid to visualize injection behavior safely outside the engine.

• Eight pulse modes mimic different engine conditions for realistic testing.
• Selectable 5V/12V output matches vehicle electronics and injector types.
• Visual inspection of spray pattern and flow rate highlights obstructions or wear.
• Dual outputs enable side-by-side comparison of two injectors for quicker diagnosis.

What features help when cleaning multiple injectors or working in a workshop?

The tester’s twin pulse outputs and clear LCD mode indicator make batch cleaning and comparison straightforward. Its compact design and adapter set support a range of injector ports, so you can hook injectors to a fuel-pressure rig or cleaning canister and cycle through modes to dislodge deposits.

• Two pairs of pulse terminals let you operate two injectors simultaneously.
• Six nozzle adaptors fit most car and motorcycle injectors for broad compatibility.
• Mode memory and visible LCD help maintain consistent cleaning cycles.
• Portable, lightweight housing for quick bench or field use.

Which injectors and vehicle systems are compatible with this kit?

This tester supports a wide range of gasoline injector systems, including direct and port-injection types found on cars and motorcycles. It is suitable for GDI, FSI, SPFI, TBI, EFI, CFI, L-JET, MPFI and many LPG injectors when used with appropriate adapters and a safe cleaning setup.

• Works with both port and direct injection units when adapted correctly.
• Supports common motorcycle injectors as well as passenger car injectors.
• 5V and 12V outputs cover older and newer vehicle electronics.
• Use with an external fuel pressure tester or cleaning rig for best results.

How do I operate the MR CARTOOL unit safely and effectively?

Always stop the pulse output before switching modes, disconnect the battery or power source as needed, and handle fuel or solvent in a well-ventilated area away from ignition sources. The device is intended for bench testing and cleaning; do not run a live engine while attached to the kit.

• Press the Stop button before changing pulse mode to prevent signal interruptions.
• Turn the engine off and relieve system pressure prior to injector removal.
• Use recommended cleaning fluids and external pressure equipment for safe cleaning.
• Follow local regulations for fuel and solvent disposal after cleaning.

Who is this for: This MR CARTOOL tester suits DIY enthusiasts, home mechanics, and professional technicians who need a portable, versatile tool to diagnose, compare and clean gasoline injectors. It’s particularly useful for shops that want a compact bench tester to speed up injector troubleshooting, and for car owners who prefer hands-on maintenance and accurate visual checks of spray patterns and flow.