GDI-Magnetic and CRDI-Piezo Direct Injector Pulser Testers


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 and current 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.


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GDI - CRDI Direct Injector Pulser-Testers (2 Separate Units Available)
Watch the VIDEOS below!

BOTH Units-Plus DEAL
GDI-Magnetic & GDI-Piezo
(includes both units with the Plus feature)
BOTH-UNIT-DEAL $1100.00...               Now $800.00 for both

Dual GDI Plus Best DEAL

GDI Magnetic Injector & Fuel-Rail-Solenoid Tester
(includes all cables, E-Manual and Plastic carrying case)
MSRP Price $595.00
...               Big Sale $485.00

GDI Magnetic PLUS Unit

GDI Piezo Injector Tester PLUS
(for Diesels and Gasoline Piezo-injectors)
(includes all cables, E-Manual and Plastic carrying case)
MSRP Price $595.00 ...               Big Sale $485.00

GDI Piezo PLUS Unit

GDI Magnetic Direct Injector Tester

CRDI Diesel Gas Injector Tester
click to enlarge


There are basically 2 units, the MAGNETIC and the PIEZO injector testers. Furthermore, there is an EXTRA CURRENT PROBE FEATURE that you can add to either or both units. This is called, CURRENT & ATTENUATION PLUS feature.

1) GDI Magnetic Injector and Fuel Rail Solenoid Tester, with or without the PLUS Extra feature. Either way, 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, also with or without the PLUS Feature. The GDI Piezo operates at 100 Volts and is good for only Piezo injectors. If you want to control the fuel rail solenoids, find out the operation 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 Current AND 10:1 Attenuation plus feature, has our FUSE PEEKER built into either GDI Injector Tester. This way you get, besides the regular unit, TWO OSCILLOSCOPE BNC OUTPUTS; so no messing around with connecting extra wires and clamp-on current probes. Just connect the GDI testers to the injector or fuel pump solenoid, connect the 2 BNC outputs to your oscilloscope or graphing meter and done, you're ready to test your components.

10:1 Attenuation Probe for Voltage Signal Output

Yes, that's right, the current-probe-plus unit has a built in 10:1 attenuation probe BUILT-IN for voltage signal reading. No need to worry about inputting 60 volts and 100 volts into your scope or multimeter, and no need to buy another attenuation probe. You don't want a spaghetti of connecting wire when dealing with HIGH-VOLTAGE.

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 100V 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 ones 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, all injector rebuilders 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 opening the door, and 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. 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 f
or 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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