YUANRI Universal Fuel Injector Tester Cleaner Kit — 6 Adapters, 8 Pulse Modes, Dual-Channel 12V/5V

YUANRI's Universal Fuel Injector Tester Cleaner Tool Kit is a portable diagnostic and cleaning system that fits most gasoline injectors, offers six adapter sizes, eight selectable pulse/power modes, and dual-channel testing for two injectors at once.

This compact kit is built for DIY mechanics and professional technicians who need a flexible way to test injector function and deliver cleaning solution safely while the engine is off. It supports both 12V and 5V drive levels, multiple pulse lengths, and includes adapter fittings that cover standard injectors plus a threaded adapter set for many BMW N-series applications. The unit includes built-in protection against reverse polarity and short circuits and can be used together with a fuel pressure gauge and an external cleaner (cleaner and battery not included).

How do the pulse modes and power settings help diagnose injectors?

The tester provides four pulse durations (short, medium, long, continuous) combined with two drive amplitude options (12V and 5V), yielding eight effective modes. This lets you mimic different ECU signals and observe injector response under varied conditions, helping identify sticking, weak spray, or timing issues.

• Short/Medium/Long/Continuous pulse lengths for varied spray patterns
• 12V and 5V drive to simulate high- and low-voltage control circuits
• Quickly isolate misbehaving injectors by comparing responses
• Useful for bench testing or on-vehicle diagnosis with engine off

Which injectors and vehicles will these six adapters fit?

The kit includes six adapter types covering common injector body diameters and a threaded adapter tailored to BMW N-series injectors. That wide range makes the set adaptable to many EFI and GDI systems on gasoline engines, though it is not intended for diesel injectors.

• Adapters sized ~9.8mm, 10.8mm, 11.8mm, 12mm, 13.5mm for standard injectors
• Threaded adapter for BMW N14, N18, N20, N26, N53, N54, N55, N63, S63 series
• Universal-fit design for most passenger cars and light trucks (gasoline only)
• Allows cleaning solution flow while testing spray pattern and sealing

What advantages does the 4-wire dual-channel layout provide?

The tester uses a 4-wire dual-channel configuration so two injectors can be activated and monitored simultaneously. That saves time when comparing bank-to-bank operation or when servicing paired injectors on multi-cylinder engines.

• Two independent test leads allow side-by-side comparison
• Speeds up diagnostics on V-engines and multi-bank fuel rails
• Facilitates synchronized cleaning of two injectors at once
• Compatible with external 12V supply or vehicle battery

What safety and power requirements should I know before using it?

The unit is designed for straightforward field or bench use but requires a 12V DC source (vehicle battery or adapter) and a separate cleaning solvent when performing cleaning. It features reverse-polarity and short-circuit protection to reduce risk of damage from common connection errors.

• Requires 12V battery or 12V DC adapter (1.5A minimum)
• Not for diesel engines — gasoline injectors only
• Polarity-reverse and output short-circuit protection built in
• Cleaner and power supply not included; prepare before starting

Who is this for: This YUANRI kit suits backyard mechanics, mobile technicians, and small repair shops that service gasoline engines and want a versatile, portable injector tester and cleaning adapter set. It is especially useful for those who need to bench-test or clean injectors off-engine, compare injector performance across banks, or work on BMW N-series engines that require threaded adapters. If you need diesel injector testing, a dedicated diesel unit is required. The product comes with a 3-year warranty and technical support for troubleshooting and service.