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Author Topic: HEI coil wires melted  (Read 646 times)

Savage Larry

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HEI coil wires melted
« on: May 08, 2021, 07:58:40 PM »
I tried to fire up my car the other day and found out that I didn't have spark. I took off the coil cap and found the wires were melted. I've talked to a few guys that have a lot of experience and they have never seen this. Does anyone have any idea what could cause this?
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Jay
Calgary, AB
1977 4 speed W72

Wallington

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Re: HEI coil wires melted
« Reply #1 on: May 08, 2021, 09:30:20 PM »
Eeek...did you have anything apart prior, or since previous start. Similar things can happen if you've left a ground cable off or left something disconnected.
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Savage Larry

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Re: HEI coil wires melted
« Reply #2 on: May 09, 2021, 10:58:23 AM »
I've been doing a lot of work on the car, maybe that's what happened. I'm done with wiring now so I'll just put in a new coil and see how that goes.
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Jay
Calgary, AB
1977 4 speed W72

71455formula

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Re: HEI coil wires melted
« Reply #3 on: May 09, 2021, 01:06:22 PM »
Looks like high resistance to ground from the rust on the ground wire.
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1971 LS5 Formula. It's on the road finally!
2013 GMC Sierra 5.3l 6 speed Diamond White(sold)
2013 GMC Sierra Denali 6.2 6 speed AWD (sold)

Re: HEI coil wires melted
« Reply #3 on: May 09, 2021, 01:06:22 PM »
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