C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Burned ignition coil wires

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Old Apr 26, 2026 | 11:36 PM
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Default Burned ignition coil wires

My ignition coil pack BAT wire is completely burned up on my 1985 C4. The car still runs and drives as usual, but what could cause this?
The coil pack is brand new, less than a week old. As my previous one (about a year old, same from Delphi) had the TACH wire all burnt up.

What's causing my coil pack ​​​​​​wires to burn up like this?



Last edited by Ryravux; Apr 27, 2026 at 11:44 AM.
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Old Apr 27, 2026 | 08:40 AM
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Is the ground strap installed ?


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Old Apr 27, 2026 | 10:48 AM
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I'm not sure. I've never seen such a part unless it's heavily blended into the rest of the car.
My car came with a kill switch. I've never had any electrical issues, so I assume the grounds are okay.
Maybe not okay enough...
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Old Apr 27, 2026 | 11:01 AM
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This pic shows a wire with terminal, yours should look like the pic I posted.

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Old Apr 27, 2026 | 11:02 AM
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I'm sure the ground strap is there but is a forgotten part but not in a well running car, why are the wires burnt Heat the circuit creates heat the engine makes heat over time stuffed under a unvented cover the insolation may have a schunk a bit and it looks like it rubbed through against the coil.


Last edited by s carter; Apr 27, 2026 at 12:22 PM.
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Old Apr 27, 2026 | 11:08 AM
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The ground strap looks to be there based on my pictures. The black wire connected to the housing?
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Old Apr 27, 2026 | 11:18 AM
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Originally Posted by Ryravux
The ground strap looks to be there based on my pictures. The black wire connected to the housing?
No that is coil ground. Look for this ground strap.


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Old Apr 27, 2026 | 11:23 AM
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You can see the ground strap in this picture.


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Old Apr 27, 2026 | 11:29 AM
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Originally Posted by AGENT 86
You can see the ground strap in this picture.

Yeah that's definitely not there. Never seen it there ever. Part doesn't seem listed for 85 and newer c4s. Just 84s
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Old Apr 27, 2026 | 11:35 AM
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What year is yours
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Old Apr 27, 2026 | 11:36 AM
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https://ebay.us/m/yO1RiV
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Old Apr 27, 2026 | 11:44 AM
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Originally Posted by AGENT 86
What year is yours
1985. I should of specified, my bad.
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Old Apr 27, 2026 | 11:58 AM
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Old Apr 27, 2026 | 11:58 AM
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Originally Posted by AGENT 86
I found the part at a local store for under 10 bucks, so I'll go ahead and order it. Thank you
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Old Apr 28, 2026 | 06:41 AM
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Originally Posted by Ryravux
Yeah that's definitely not there. Never seen it there ever. Part doesn't seem listed for 85 and newer c4s. Just 84s

not true is on 1989s
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