Ongoing SC no start issue

[dntlft]

Thanks Dennis for all of your detailed information, I will test this the best I can and get back with a follow up post. Hopefully my headache will help someone with the same problem!

[timmy2]

I'm just hoping to resolve your problem for now.

[dntlft]

I tested the green wire after removing the distributor to check continuity. I used a paper clip in the female terminals from the dist. end of the wire then checked resistance on the 2 terminals of the 6 pin CDI connector. I'm guessing that the the black wire and green wire corresponded to the correct terminal when I got good continuity... 0.4 ohms on 1 part of the coax, 0.8 ohms on the other part.
What now? Check terminal 15/red wire of the 6 pin connector to see that I'm getting power from the battery? Is it my CDI box?

[timmy2]

If the CDI is whining you are getting power to it.
Not knowing where you live or the exact year of your car I would guess you should try to swap the CDI box out with a known good one.
Just a thought, is the wire from the coil to the dizzy in good shape and fully pushed in all the way. Sometimes they don't seat all the way. Same with all the ignition wires into the dizzy cap.
What is the resistance across the rotor?
Are there marks on the rotor showing it is making contact.
if the dizzy is still out, what is the resistance of the internal coil of the dizzy? (measure where the green wire goes in, spin to make continuity with the reluctor?)

Are we having fun yet!

[dntlft]

Thx for response!
I live in central MO, car is 1983 SC
Wire from coil to dizzy is new and worked fine prior to engine shutting down (see beginning of my post)
Resistance across the rotor is 4.90 kiloohms
What is the reluctor?
Is the green wire OK given the resistance values above?
This is an older rotor currently on dizzy, I do have new parts, rotor, cap, plugs, and I was planning on replacing them anyway.

The more I learn, the more fun I have!

[timmy2]

LOL, somehow I knew you'd ask!
Reluctor looks like someone stuck a spider in your distributor..... (6 legs and all...)
The only place I know of to get one is here:
https://www.gowestyautoparts.com/1978,PORSCHE,911-SC,1262573/Secondary-Ignition/Bosch-Ignition-Reluctor,741-43003-101/

[dntlft]

Dennis,
Does it matter if the negative lead is on the male connectors for green wire, or should the neg lead of the multimeter be clamped on one of the "spider legs" while touching the male connector with the positive probe. Sorry to be such a pain about this, but I was getting resis values all over the map, and I think that was only when the neg probe was touching the body of the distributor. Otherwise, I'm getting 0.L on the multimeter. Is that infinite resistance??
Thanks again, you've been extremely helpful with pointing me straight!!

[timmy2]

From what you posted it sounds like you have good continuity. An infinite reading would be the same as what the meter says when you hold the probes apart in the air.
Next test would be the cap to coil wire as well as each cap to plug wire.
Plug wires if original should be around 3K or so with the connectors attached. (Check manual for value)
Can you get hold of a known good CDI box to swap out?

[timmy2]

Sending you a PM