DPTOOL Fuel Injector Noid Light Test Kit — 8 Noid Lights, IAC Tester & Extension Lead for Injector Pulse Diagnostics

DPTOOL Noid Light Test Kit is an electrical diagnostic kit that quickly tells you whether fuel injectors and idle air control circuits are receiving the correct pulse signal from the vehicle computer.

When an engine runs poorly, the problem can be electrical rather than mechanical. This kit gives a fast, reliable way to check injector pulse and idle air control (IAC) signals without guessing or disassembling fuel system components. It includes a range of noid lights, an IAC tester, an extension lead and a carry case so you can test most domestic and import wiring harnesses on the bench or at the vehicle.

How will this kit help me diagnose injector-related drivability problems?

Use the noid lights to confirm whether the ECU (or PCM/ECM) is sending the switching voltage that tells an injector to open. A flashing noid light indicates a pulsed signal; a steady off or on means there’s likely an electrical fault or open circuit to investigate. This saves time by ruling out electrical issues before pulling apart injectors or fuel rails.

• Eight noid lights match common injector connector shapes and pinouts.
• Plug directly into injector harnesses—no splicing or damage to factory wiring.
• Instant visual feedback while cranking or idling.
• Saves diagnostic hours vs. trial-and-error replacement.

What does the IAC tester and extension do for troubleshooting?

The included IAC tester lets you apply a signal and observe IAC movement or circuit response without removing the valve. The extension lead increases reach so you can view the noid light from the driver’s seat while the assistant cranks the engine, improving safety and convenience during testing.

• IAC tester allows safe, on-vehicle checks of idle control circuits.
• Extension keeps you clear of moving components while observing lights.
• Works with common IAC connector types to identify stuck or unpowered valves.

Which vehicles and connector types does this kit support?

This kit covers a broad range of injector and throttle-body connector styles found on many GM, Ford, Geo and Bosch systems, including PFI and TBI variants. The assortment of terminals and adaptors increases compatibility across model years and aftermarket harnesses so you can test most vehicles you encounter in a garage or mobile service.

• Includes adapters labeled for GM PFI, GM TBI, GM SCPI, GM Multec2, Ford TBI, Geo TBI and Bosch PFI.
• Designed for domestic and import applications; not limited to a single make.
• Handy for fleet, DIY, and professional mechanics working on varied vehicles.

How easy is it to use this kit during real-world diagnostics?

Very straightforward: plug the appropriate noid light into the injector harness, sit in the driver’s seat, crank the engine and watch the LED for pulses. No special tools or software are required, and the compact case keeps everything organized for mobile technicians.

• Quick plug-and-play hookup with visual LED confirmation.
• No need to remove injectors or cut factory wiring for testing.
• Portable case keeps lights, IAC tester and extension protected and accessible.

Who is this for? If you’re a mechanic, mobile technician or a hands-on DIYer who routinely diagnoses poor idle, misfire, or fuel delivery concerns, this DPTOOL kit removes electrical unknowns fast. It’s especially useful for shops and technicians who service a mix of domestic and import vehicles and need a compact, reliable way to verify injector and idle control circuitry before replacing parts.