What voltage to injectors?

[Anonymous_User]

What voltage are the injectors run at? If other than 12v is there some method of testing that the proper power is there? I doubt if my multimeter would pick it up being switched that fast.

[MiniMopar]

They are supplied with 12V by the ASD relay. The other leg is grounded by the ECU. It's not just a simple grounding, though. They use an injector driver which performs a peak-and-hold. A lot of current is applied to move the pintle, but a lower current it applied to hold it open.

[Anonymous_User]

OK, so I can check to be sure there is 12volts at the injector, but the ground....

Are two injectors fired simultaneously?