I was performing a fuel pressure test and pulsing each of the injectors with an OTC that cycles the injectors 50x in 5 seconds. Now, I've got a misfire in #8. I pulled the connector and attached my DVOM... 0.0v.

Did it touch ground? I was trying to be careful.

If so, did that fry one of the drivers in the pcm? Is there a way to check the pcm? or Reset the pcm?

I've got Tunercat and Datamaster.

Thanks.

 

The 12V power is supplied directly from the injector fuses, providing a constant 12V on the pink wire in each harness connector. The PCM supplies the ground to fire the injector. Which wire did you connect the voltmeter to? Did you check the resistance across the injector pins - should be 12-15ohms.

 

You mentioned fuses... I just went to Shbox's website to pull the injector wiring diagram. There are (2) 7.5 Amp fuses... checked them, one was blown. I guess one must have brushed the block when I was moving the connector around even though the terminals are recessed. Thank you very much. I really thought I blew a driver in the PCM.