I just watched Paul's Nissan Maxima Misfire Case Study pt 1. In the video he locates a ground wire that ties in all the ignition coils to check coil ramps. Other ground wires are connected to it by the intake manifold. I believe there was four wires connected at ground. I have the engine performance diagram that shows the coil grounds tied in from the splice but from there it branches out to several location like ECM, J/C connectors etc. Is it anywhere in Mitchell that shows you that specific ground wire location for those coils. Otherwise without the video I would have never thought to check all at once. I would have done them one at a time. Thanks.
This is the video you're talking about, right? Just for anyone else not following along:
I think the Ground Distribution diagram would help in this situation. It'd give you the specific layout of the ground for the coils, and where it all ends up.