Draper Injector Tester - 5V/12V
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Product Information
Full details
This Draper Injector Tester is designed for automotive technicians and DIY enthusiasts who need to diagnose electronic fuel delivery issues. Its key benefit is the ability to electronically operate and test injectors, identifying problems like blockages, sticking, or leaks with switchable 12V and 5V outputs. A potential caveat is the need for a 12V vehicle battery for operation, limiting its use in some mobile scenarios without a power source. The tester features four selectable modes (short, medium, long, continuous), an LED indicator, and includes extension leads for easier access in tight engine bays.
All features
| Model Part Number | 24703 |
|---|---|
| Brand | Draper |
Extended Product Information
FAQs
Can this tester be used for diesel injectors?
No, this injector tester is specifically designed for petrol (gasoline) fuel systems and is not compatible with diesel injectors.
What is the difference between the 12V and 5V outputs?
The 12V output is for traditional Electronic Fuel Injection (EFI) injectors, while the 5V output is necessary for newer Gasoline Direct Injection (GDI) injectors, which operate at a lower voltage.
How do I use the 'continuous' mode?
The 'continuous' mode pulses the injector constantly. It can be used for basic injector cleaning procedures when used with appropriate cleaning solutions and equipment, or to observe prolonged behavior.
What do the different modes (short, medium, long) test?
These modes allow you to test the injector's response to different pulse widths, from a quick burst ('short') to longer durations ('long'), helping to diagnose responsiveness and potential sticking issues.
Are the extension leads included?
Yes, the tester comes with three pairs of extension leads (140mm) to help reach injectors in tight or awkward locations.
How is the tester powered?
The tester is powered directly from a 12V vehicle battery. You connect the tester's power leads to the vehicle's battery terminals.
Can this tester measure injector flow rate?
No, this tester is designed to electronically operate and test the functionality of injectors. It does not measure the actual fuel flow rate.
Troubleshooting
Injector does not fire or respond
Verify the 12V vehicle battery power supply is connected correctly and has sufficient charge. Double-check the voltage selection (12V/5V) matches the injector type. Ensure the injector connector and tester leads are clean and making good contact. Confirm the injector itself is not internally damaged or shorted. Check vehicle fuses related to the fuel injection system.
LED indicator not illuminating
Check all power connections from the vehicle battery to the tester. Ensure the vehicle battery is charged. Test the tester on a different vehicle or known good power source if possible.
Intermittent injector response
Inspect the tester's leads and connectors for any signs of damage or corrosion. Ensure a firm connection to both the injector and the power source. Check the wiring harness leading to the injector for damage or loose connections. The injector itself may be failing.
Tester feels hot during use
Briefly discontinue use and allow the unit to cool. Prolonged use in high-load modes (like continuous) can generate heat. Ensure adequate ventilation and avoid covering the unit. If overheating is persistent or rapid, discontinue use and contact support.
Pros and Cons
Pros
- Versatile testing capabilities for both 12V and 5V injectors.
- Multiple operating modes allow for thorough diagnosis and cleaning.
- Extension leads improve accessibility in confined engine spaces.
- Direct power from a vehicle battery simplifies field use.
- Clear LED indicator for easy monitoring.
Cons
- Requires a 12V vehicle battery for operation.
- Primarily designed for petrol fuel systems.
- Lead lengths may be insufficient for very large or complex engine bays without extensions.
- Does not provide flow rate measurements, only operational testing.
Setup, Compatibility & Care
Setup:
- Ensure the vehicle's ignition is OFF.
- Identify the injector to be tested and disconnect its electrical connector.
- Connect the appropriate positive and negative leads from the injector tester to the injector terminals. Use the provided extension leads if direct access is difficult.
- Connect the tester's main power leads (positive and negative) to a reliable 12V vehicle battery source (e.g., battery terminals).
- Select the appropriate voltage output (12V for standard EFI, 5V for GDI injectors) using the voltage switch.
- Choose the desired test mode (short, medium, long, or continuous) using the mode selector.
- Turn the vehicle's ignition ON (but do not start the engine unless specifically instructed for advanced diagnostics).
- Observe the LED indicator for confirmation of operation.
Compatibility:
- Injector Types: Compatible with 12V EFI and 5V GDI injectors.
- Fuel Type: Suitable for petrol (gasoline) fuel systems.
- Power Source: Requires a 12V vehicle battery.
Care:
- Keep the tester clean and dry. Wipe with a soft, damp cloth as needed. Avoid harsh solvents.
- Store leads carefully to prevent kinks or damage.
- Inspect leads and connectors regularly for wear or damage.
- Ensure connections are secure during use to prevent intermittent testing or sparking.