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Old 11-01-2024, 07:57 AM   #1
don t. - 72gmc
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Electronic ignition

It's been a long time since I played down this road. Some terminology may not be correct.

Vehicle has a 327, seems to be factory electronic ignition. I seem to have no spark at the plugs. Cap, rotor, look ok. Removed coil cover. Checked wires, seem to be good here too.

Removed coil. Removed black washer/insulator. Removed spring but a part was left in the dizzy....


Looks like it's broke....


Would this be my issue?
If yes, what is the name of this part?

Thanks much...Don.
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Old 11-01-2024, 02:09 PM   #2
Willshook
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Re: Electronic ignition

Thats the carbon button that connects the center tower in the cap to the rotor. It's usually positively retained in the cap - not sure it can be replaced outside of replacing the cap...?
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Old 11-01-2024, 05:15 PM   #3
MySons68C20
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Re: Electronic ignition

Replace the cap. Great pics btw.
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Old 11-02-2024, 06:41 AM   #4
Dead Parrot
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Re: Electronic ignition

That part being broken is consistent with your no spark symptom.
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Old 11-02-2024, 07:10 AM   #5
don t. - 72gmc
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Re: Electronic ignition

Thank you all.
Very much appreciated...Don.
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Old 11-02-2024, 01:56 PM   #6
geezer#99
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Re: Electronic ignition

Is this factory electronic ignition actually a transistorized ignition? Or just an hei.
It might be worth a chunk of change!

You got pics of it?

Last edited by geezer#99; 11-02-2024 at 02:28 PM.
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Old 11-03-2024, 08:25 AM   #7
don t. - 72gmc
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Re: Electronic ignition

IIRC it's a GM HEI. This is the best pic I got....


FWIW....Im not a mechanic outside of shade tree maintenance. This issue is in the wife's toy....


She likes it...Don.
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Old 11-03-2024, 08:52 AM   #8
geezer#99
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Re: Electronic ignition

Yup, just an hei!
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Old 11-03-2024, 06:20 PM   #9
Willshook
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Re: Electronic ignition

Don't see too many of those - nice!

Make sure the HEI is getting a full 12V as well.
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Old 11-06-2024, 08:55 AM   #10
don t. - 72gmc
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Re: Electronic ignition

Quote:
Originally Posted by Willshook View Post
Make sure the HEI is getting a full 12V as well.
I put a meter on the power to coil wire.
I got 11.74 volts.
At the battery I get 12.6 volts.
Is 11.74 close enough?

Thanks much...Don.
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Old 11-06-2024, 10:41 AM   #11
Willshook
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Re: Electronic ignition

Quote:
Originally Posted by don t. - 72gmc View Post
I put a meter on the power to coil wire.
I got 11.74 volts.
At the battery I get 12.6 volts.
Is 11.74 close enough?

Thanks much...Don.
It's usually best to just run a wire directly to the IGN UNFUSED spade on the fuse block. Only takes a few minutes.
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Old 11-28-2024, 08:36 AM   #12
don t. - 72gmc
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Re: Electronic ignition

Update. Friend who knows more about electronics than I.
HEI wire is powered in fuse box the ign unfused stud.
I get 11.74 volts at the stud. Batt = 12.4v.
Got 11.74v power to the HEI coil.
Got no power to the ignition module.
R&R module.
She runs like a scalded dog.

Thanks all....Don.
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Old 11-30-2024, 01:33 PM   #13
MySons68C20
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Re: Electronic ignition

Thanks for the update, good deal!!
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