Originally Posted by bigb229
We're getting like .4 ohms resistance through the grounds and 5 volts on the supply.
If you were measuring voltage across the connector for the injector, this may be somewhere in the ball park. If the reference you were using is a pulsed signal from the PCM, it would make the supply voltage look lower on a meter.
When measuring injector voltage, your black lead should go to to battery ground and the red lead to the green/ black or whatever color wire is common to all injectors. You should read 12v while running.
Did you measure the resistance of the injectors themselves?