Originally Posted by cobalt327
If you are using a GM hei, there is a three wire pigtail or harness coming from the distributor that goes to the coil (red arrow below). It has the ground for the coil. Did you remove the ground wire from the hei pigtail/harness to be able to use your own ground wire?
I didn't remove it. But, so then here is my question: If that pigtail you showed is where you are supposed to plug the distributor into the harness, then what of the pins that are on the cap itself? There is the pigtail you showed, but there is also pins for the same thing on the coil/cap itself. I never used the pigtail before (just had the coil+ wire, ground, and tach hooked up to the cap) and it always ran fine.