[mwebb]

since you do have a DSO
Digital Storage Oscilloscope ?

you can use a 1 ohm 10 watt resistor in series with an Injector

since E=I x R or Voltage equals current multiplied by resistance
if resistance equals one E=I x 1 or E=I

or voltage = current , in that circuit , as per OHM's Law

you can connect your scope test leads across the 1 ohm resistor in series with an injector
you will see the SAME current image that i posted for your injector
in voltage
sequential injectors use less than 1 amp so set scope scale to 0 to 1 volt at about .5 ms per division to start then adjust to see image full screen .

place your cursors to get your actual injector on time