So my 67 GT wouldn’t start. It seemed like there was no spark so I Pulled a plug and turned it over and sure enough, no spark. Opened the distributor and took out the Petronix module and found this.
Jim
Only thing I can think of was not enough extra wire in cap when vac adv plate moves?. Poor dist. grounding?
Of note here, I just bought a replacement for the module only from Summit $100
Flip the pertronix over. I see rubbing damage to the red 12v wire
What coil were you using. It looks like maybe someone decided to run 12 volts to a very low impedence coil and exceeded the current capability of the Pertronix 1.
I replaced the Pertronix 1 in my Dad’s Corvette this spring. It failed and let the magic smoke out and I couldn’t get it back in. NPD had one on the shelf and they’re local.
Ford distributors up front are much easier than Chevy distributors in the back for this task.
I bought the Petronix coil and wires so everything would match. I will have to look at the red wire insulation.
I just checked the red wire under my 60x scope I have. It’s hard to tell 6 going on with the insulation. I can’t tell if it is where or if it’s from the ground burning out. I put a new one in today, and it fired right up.
Memory serves the insulation on those wire leads is pretty flimsy…I always slide a heat shrink tube over them to keep them from being damaged by the previously mentioned advance movement
Good idea
Bill how thick is the gap gauge (plastic piece)
Wanted to check and reset mine but lost the gauge
It’s about the thickness as the cover on a book of matches. Not a precise measurement but it does not have to be
Mike,
The one I just installed is .030". For the 390, I had to push it all the way from the magnetic ring. I also ground the base a little since it was pretty close to the vac advance arm.
Jim
You are correct about the insulation being flimsy. I might try the heat shrink idea.
I had set mine at .035 ; it runs just curious
Thanks
