if it's like an MSD it should have a low current turn on lead that should be a switched 12v source.
the thicker red wire should be wired through a fuse to basically the battery.
still doubt any of that is going to give you a miss only after 2500rpm. and especially be worse when it's colder...
Ya it’s exactly like an msd, the thin red wire is a switched 12v wire.
I have that going to a 50 amp toggle switch.
The big main power wire is going directly to positive terminal on battery and the big ground is going directly too negative battery terminal.
Coil wires are correct, pick up coil wires are correct.
It’s just strange whatever it is, I would be confident it was the ignition box at this point except for the fact that the issue seems to get better when I take away the vacuum advance.
That’s what led me to rotor phasing a few months back.
But I have checked rotor phasing with my current firecore distributor with and without vacuum advance and it looks good.
So that’s the only thing that has me a little baffled.
I’m still leaning towards the ignition box, I just wish there was a quick and easy way to test the box before spending the money on another one.
