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Posted by: Tdskip Feb 7 2021, 02:52 PM

I’ve got an intermittent Hot starting issue, not the starter itself, on the new to me 1975. The starter turns over, it’s got fuel so it appears I have a spark issue. I don’t really have any history on the car and noticed that the coil that’s on it is pretty old but also has leads coming off it that are not ignition-based.

That is obviously something that needs to get tracked down because as of right now I don’t know where those are going, but I thought hanging any wiring off the coil was kind of a bad idea, no?

Posted by: Cairo94507 Feb 7 2021, 05:57 PM

I agree with you. I would trace those wires to what the heck they are powering.

Posted by: Tdskip Feb 7 2021, 06:23 PM

Thanks Michael / hope you got some driving in this weekend.

Posted by: wattele Feb 8 2021, 02:19 AM

One of the wires is for the RPM meter
I think it is the purple one

Posted by: Tdskip Feb 8 2021, 08:25 AM

Oof! Of course it is, you are correct, I spaced on that. Thanks for the reminder.

Still have a +12v connection where I shouldn’t, might be tail lights.

Posted by: IronHillRestorations Feb 8 2021, 08:36 AM

I’ve seen several fuel pumps powered via the switched 12v on the coil

Posted by: ClayPerrine Feb 8 2021, 09:34 AM

And as I am sure you will agree, that is a bad idea.

Clay

Posted by: IronHillRestorations Feb 8 2021, 09:54 AM

Fo sho

Posted by: VaccaRabite Feb 8 2021, 11:33 AM

Some coils will go through a ballast resister before they get to the dizzy, if you see a lead going to a big ceramic block that's what that is. That is usually for aftermarket distributors though.

Zach