HELP! spark jumping from wires to the plugs like crazy (long post)!!!!!!!! - Hot Rod Forum : Hotrodders Bulletin Board
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Old 06-21-2004, 07:49 PM
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Unhappy HELP! spark jumping from wires to the plugs like crazy (long post)!!!!!!!!

Well I thought I had some bad plugs or wires to start with as it had a little miss to it. So I try new plugs, I knew my plugs/wires had been in for a long while but the dist is a band new assembly Mallory Unilite.(as in like 2 weeks old)

Anyways so I dident get any results from new AC Delco 44's I just put in that I normaly run and decide to get a new set of MSD wires.

Here is where I found the problem...I got the last wire on as it was getting dark and I went inside to wash my hands. When I came back out I was about to put the hood down when I noticed that the spark from every single wire was jumping from the boot down over the porclin down the the part of the plug that screws into the head!!!
Its pretty strange looking kinda like my plugs are glowing!!!!

I then tried a old plug&wire on #1 just to see if they were doing it too and they in fact were doing the same thing...So I guess I got new plugs/wires for nothing

Guys any ideas here why I jumping spark from the plug boots to the head/part of plug that screws into head??? Im running a MSD6AL, mallory unilite dist and coil, MSD wires and a set of AC Delco 44 plugs. Seems like it should work well together

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Old 06-21-2004, 08:06 PM
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How wide are your plugs gapped? Be sure they are gapped per the ignition manufacturer's specs. Also put some dielectric grease in the plug boots - it's made to stop this kind of arcing and is available at most major auto parts stores.
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Old 06-22-2004, 12:33 AM
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And be sure that the outside of the plug is clean.
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Old 06-22-2004, 06:15 AM
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plugs gap is 45 compression is about 10.5.1 (Iron heads running on pump gas 93).
The grease is shomething I should have thought of!!!
I will give that a try tonight and see.
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Old 06-22-2004, 09:23 AM
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What engine? sounds like a big gap.

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Old 06-22-2004, 03:39 PM
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355 chevy with iron bowtie phase II heads.
Seems with a mallory unilite, pro master coil, MSD6AL, and MSD plug wires I should be able to run the 45 gap... I have been running it for a long time without any problems even with the 10.5.1 compression
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Old 06-22-2004, 04:30 PM
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Try closing it to 35. 45 could be to much resistance.

Troy
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Old 06-22-2004, 07:09 PM
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Wires

[color=lightblue][size=3]Doc here

What Size MSD wires Did you install, 8.5 mm?

Doc
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Old 06-22-2004, 08:01 PM
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Well the grease is a no go and dident help a thing but Im sure it will make pulling the wires off again a little more easy
Just more of the same pulsing light blue/white light from around the porcelain
part of the plug between the plug wire boot and head as well as that crappy feeling I get in my guts while the engine is missing no matter what RPM!

Makes me want to push the thing over a cliff

Yep they are the 8.5 wires....I will try closing the plug gap tomarrow and see if it helps.
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