Ok, I've been researching and trying to fix this issue for nearly a month! Heres some background info:
- 1997 civic cx
- 1995 civic d16z6 engine sitting in garage
- performed a mini-me swap (Entire ex harness swapped except for the wires to the ignition hub because the car was gutted on the inside at the time)
- New distributor, cap, rotor, plug wires, main relay, battery, plugs, coil, igniter
- 11.9v going to the coil when key is in "on" position
- power to coil goes to ZERO when the engine is being cranked over
- when key is let go, power to coil jumps back up to 11.9v and lets off one solid spark at the plug on cylinder 1.
- thought starter was starving the system so i disconnected it, power to coil still went down to zero when the key was turned to start
- tried to jump the coil by running a wire directly from the battery to it, still no spark
- all grounds appear to be solid with a clean connection
My thoughts:
Issue with alternator or ignition hub, or a ground.I need to have this car running because I am moving and any help would be greatly appreciated. I am completely out of ideas!

 

you should check your alternator

 

The alternator is part of the charging system, not the ignition system, so I have a trusty battery charger making sure the battery is working since it's not running... The car can run without a battery in it, so I shouldn't need it to start it anyway. This is why i'm so confused[&:]

 

Would have to look at a wiring diagram and trace it down. Maybe the ignition is connected to an accessory circuit instead of the ignition circuit. Or it could be the key switch itself.

For a workaround, you should be able to start the car by turning the key on and then jumping the starter, or roll-starting it.

 

Alright, well i'm gonna try the roll start tomorrow. Thanks for the info, will keep you all updated