Car is finally back, and I have been working diligently to figure out it's final problem. Can't seem to lick it, so asking for anyone's help on this one:
Two coils on fender wall, with only one firing. I will refer to the coil toward the front of the car as the leading coil, and second coil closest to the steering wheel, the trailing coil. The trailing coil is the one that is not firing. Here is how everything is wired:
Hot wire coming from positive battery cable via a couple of grounded relays, comes up and is wired to the positive terminal on the trailing coil. From the trailing coil, there is a bridge wire from the positive terminal of the trailing coil to the positive terminal of the leading coil. Next, the leading pickup (ignitor) from the distributor is wired to the positive terminal of leading coil (black wire from ignitor) and the negative terminal of the leading coil (yellow/green wire). The trailing pickup (ignitor) from the distributor is wired to the positive terminal of trailing coil (black wire from ignitor) and the negative terminal of the trailing coil (yellow/green wire). Finally, there is a tachometer wire (yellow/green or yellow/blue) connected to the negative terminal on the trailing coil.
Here is what is happenning:
Only the leading coil is firing to the distributor and to the spark plugs. The leading coil is connected to the leading position on the distributor. Being as that the leading pickup (ignitor) is wired to the leading coil, only the leading spark plugs on the front and rear rotor are getting a spark. I varified all of this utilizing a timing light.
Here is what I have tried, always with the use of the timing light:
-Assumed I had a bad trailing coil, so purchased a second MSD Blaster 2 coil, and installed in the exact manner that previous coil was installed, in the trailing position. Absolutely no change!!!!
-Decided to take previously assumed bad coil from trailing position and installed in leading coil position, and now that assumed bad coil fires just fine.
-Pulled coil wires out of leading and trailing coils, and flip flopped their position for each coil. Now trailing spark plugs fire, and leading spark plugs do not, but still firing off of leading ignitor. Hoping this proves that all distributor wires will carry current correctly.
-Replaced coil wires back to their correct positions, then disconnected the ignitor wires from each coil, and flip-flopped their position on the coils. Leading coil is still the only coil firing, but now leading spark plugs are firing off of the trailing pickup (ignitor). I'm hoping this proves that both pickups (ignitors) are working correctly, providing a signal as they are supposed to.
-Disconnected tachometer wire from negative terminal on trailing coil. Nothing happenned other than the tachometer stopped working.
-Tried connecting tachometer wire to negative terminal on leading coil, and upon touching negative terminal on leading coil, engine tries to die. Maybe someone could explain this one to me, as to why this is happenning. I have to assume it is interrupting the signal from the leading pickup (ignitor) from the distributor.
At this point, I feel that I have proven all spark plug wires are good and in proper working condition. All coil wires from coils to distributor are good and in proper working condition. Also, I feel that I have proven both pickups (ignitors) are working properly, but only when connected to the leading coil.
What else could be wrong? I am not a wiring expert here, but I feel like I have exhausted all options within my capacity. Is the wiring in it's present state incorrect?
Please advise any ideas or thoughts you may have regarding this issue.
Thanks again, as it is so close to being road worthy!