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May 31, 2015 | 10:03 PM

Odontia32m

Thread Starter

Cruising

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Help, first post

87 with 58K. I changed the plugs, wires, rotor and cap tonight. This was due to rough idles when cold. Seemed all original stuff.

The issue is the coil is arcing now, engine running great, the display flickers slightly. The coil wires arc no matter how positioned. I ohmed the red and white wires with the coil unplugged and it shows a dead short, should it?

Any help would be appreciated.

Bob

Jun 1, 2015 | 09:25 AM

Odontia32m

Thread Starter

Cruising

Joined: May 2015

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Coil Arcing, any ideas why?

Quote:

Originally Posted by Odontia32m

Any ideas?

Jun 1, 2015 | 09:31 AM

antfarmer2

Race Director

Joined: Mar 2015

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Quote:

Originally Posted by Odontia32m

Any ideas?

Clean the coil and wires or fix if cracked or split.

maybe a coat or two of liquid tape

Last edited by antfarmer2; Jun 1, 2015 at 09:34 AM.

Jun 1, 2015 | 09:59 AM

Odontia32m

Thread Starter

Cruising

Joined: May 2015

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Thanks

Quote:

Originally Posted by antfarmer2

Clean the coil and wires or fix if cracked or split.

maybe a coat or two of liquid tape

So this is a common occurrence with the lead wires? I guess I angered it after 27 years from its resting place?

Jun 1, 2015 | 10:59 AM

Hooked on Vettes

Melting Slicks

Joined: Aug 1999

Posts: 2,240

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From: Baltimore, MD USA

Quote:

Originally Posted by Odontia32m

Make sure you have a clean connection on the ground ring lug wire to the frame of the coil and the ground strap that contacts the frame of the coil.

Here's a good video showing coil replacement and a video showing coil resistance measurements. Your measurement from the Red wire to the White wire appears to be normal. Should be less than one ohm.

If you can't find the problem, reinstall the original cap and rotor.

Jun 1, 2015 | 12:16 PM

ClaudioC4

Racer

Joined: Jan 2015

Posts: 314

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From: Wareham, MA

This happened to me, when I replaced my factory coil with a Taylor coil. I replaced it with one from auto zone and that fixed the problem.

Jun 1, 2015 | 01:19 PM

Odontia32m

Thread Starter

Cruising

Joined: May 2015

Posts: 13

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Quote:

Originally Posted by ClaudioC4

This happened to me, when I replaced my factory coil with a Taylor coil. I replaced it with one from auto zone and that fixed the problem.

Well after that video I think I found the issue. I am stupid and did not reinstall the ground strap. I have a new coil and strap waiting for me at a whole $24. Thanks that video pointed out the obvious.

I will report back tonight with hopefully good news. BTW I will never. ever , ever change those plugs again