GDI-Magnetic and CRDI-Piezo Direct Injector Pulser Testers

(With 10:1 ATTENUATION CIRCUITS built-in)

Offering 2 different Direct Injector testers. GDI stands for Gasoline Direct Injection (Petrol) and CRDI means Common Rail Direct Injection (Diesel & Gas) found mostly on Diesel and some gasoline engines as well. Finally, here are 2 affordable units to test these injectors. There are 2 types of direct injectors found on cars today, the Magnetic and the Piezo injectors. The 2 separate GDI Magnetic and CRDI Piezo Injector Pulser Testers are able to test both, Magnetic and Piezo injectors. The PULSE waveform design is radically different on each, so 2 separate units are needed and we designed them accordingly. The GDI Magnetic unit can also test and actuate GDI Fuel Rail Pressure Regulator Solenoids.

: Yes, that's right, this feature not seen on any other GDI injector tester, gives you attenuated voltage outputs for you oscilloscope or graphing multi meter. Dealing with HIGH-VOLTAGE is dangerous, so why mess around with spaghetti wiring? This feature, offered on both PIEZO and MAGNETIC units, is for techs interested in using your multi-meter and scope for in-depth diagnostics. If you also need a current signal to monitor certain injector characteristics, then use the
Fuse Peeker seen here on our site, also made by us, or a clamp-on Amp probe.


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4 Options to choose from below:
1) Dual Unit Below (GDI Magnetic + GDI Piezo) - $985.00 USD
2) GDI Magnetic Inj. Tester Only - 585.00 USD
3) GDI Piezo Inj. Tester Only - 585.00 USD
4) GDI Magnetic + GDI Piezo + Laptop/Scope/Ebooks (best deal of all) - $2195.00 USD

BOTH Units DEAL, GDI-Magnetic + GDI-Piezo
BOTH-UNIT-DEAL $1590.00...               Now $985.00 for both 
Dual GDI Magnetic + GDI Piezo Best DEAL!

GDI Magnetic Injector & Fuel-Rail-Solenoid Tester
(10:1 ATTENUATION output to meter)
(includes all cables, E-Manual and Plastic carrying case)
MSRP Price $795.00 ...               Big Sale $585.00

GDI Magnetic Tester BUNDLE Below

GDI Piezo Injector Tester
(for Diesels and Gasoline Piezo-injectors)
(10:1 ATTENUATION ouput to meter)
(includes all cables, E-Manual and Plastic carrying case)
MSRP Price $795.00 ...               Big Sale $585.00

GDI Piezo Bundle

GDI Magnetic Direct Injector Tester  CRDI Diesel Gas Injector Tester

click to enlarge

Also get the Fuse Peeker here. Watch the VIDEOS!


There are basically 2 units, the MAGNETIC and the PIEZO injector testers.

1) GDI Magnetic Injector and Fuel Rail Solenoid Tester. The magnetic unit can test GDI injectors and the fuel rail pressure control solenoid, which can sometimes employ 14 to 24 volts and is also PWM controlled.


2) GDI Piezo Injector Tester. The GDI Piezo operates at around 80 to 110 Volts DC and is good for only Piezo CRDI injectors. If you want to control the fuel rail solenoids, find out the operating voltage. If 12 to 14 volts, then use our PWM Bi-Directional Controller; or if your system uses the rail pressure solenoids that operate at 14 to 24 volts, then you also need the GDI Magnetic Tester seen here.

The 10:1 Attenuation feature, has it built into either GDI Injector Testers. This way you get ONE OSCILLOSCOPE OUTPUT; so no messing around with connecting extra wire probes. Just connect the GDI testers to the injector or fuel pump solenoid, connect the signal attenuated output to your oscilloscope or graphing meter and done, you're ready to test your components.

10:1 Attenuation Probe for Voltage Signal Output

These units have a built in 10:1 attenuation probe BUILT-IN for voltage signal reading. No need to worry about inputting 60 volts and 110 volts into your scope or multi-meter, and no need to buy another attenuation probe. You don't want a spaghetti of connecting wires when dealing with HIGH-VOLTAGE. If you also need a current waveform, then use our Fuse Peeker for that or a clamp-on Amp probe.

How are GDI Magnetic and Piezo direct injectors triggered or actuated?

The answer is, much like the older styled injectors, but at HIGHER VOLTAGES and on BOTH, the Ground and Voltage SIDE. How high? GDI Magnetic injectors use 60 Volts and Piezo systems 100 Volts and higher. They both use a PWM Peak-and-Hold style injector power signal scheme, with an added twist. Both injectors, triggered at 60V and 120V respectively, also use a PWM power signal on the Hold part of the trigger pulse. So it's not just Peak-at higher current and Hold-at lower. The PWM side pulses at the same voltage level as the Peak part. Here's what we mean:

As you can see, it's similar but different, when it comes to Direct Injector trigger signals. Our GDI CRDI Pulser Tester can trigger all injectors, except the older MPFI injectors of course. You could trigger the injectors in the car and using the pressure sensor, monitor its signal to do a leak-down test, as you would with older injectors. But, using the pressure sensor, rather than the fuel gauge.

Want to test these injectors outside the engine? Ok, fine then you have two options:

OPTION 1: Use low pressure at about 39 to 75 PSI. Yes, many injector re-builders are using low pressure testing. You can even use the low pressure pump in the car to pressurize the system to low pressure, with Key-On-Engine-OFF, sometimes either using the scanner, jumping the relay or using our PWM-Bi-Directional Controller to command the fuel pump ON.

OPTION 2: Outside the engine, use a low cost Poppet injector pressurizer, used for the old Diesel injectors, and then trigger the GDI or CRDI injector with our testers. But don't use Diesel fluid, just injector cleaning fluid. It's that simple.

See below the actual waveforms that you can capture with our units. Interpreting them in another matter, for which we have various books and videos seen here in the main page.

GDI Magnetic Injector Tester VIDEO below:



GDI Piezo Injector Tester VIDEOS Below:


Below photos is for the GDI Magnetic Direct Injector Tester Unit (not the Piezo)
Click on photo to ENLARGE. Taken with our GDI Magnetic and Piezo units.

GDI injector tester waveform  GDI injector tester waveform  GDI injector tester waveform  GDI injector tester waveform  GDI injector tester waveform


GDI Magnetic Direct Injector Tester   GDI Magnetic Direct Injector Tester  CRDI Piezo Injector Tester  CRDI injector tester controls  CRDI Injector voltage waveform  CRDI injector current waveform


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