The Ford Barn

56yblock · 01-12-2019, 07:50 AM

hello guys
i had a problem with my coil ,
she burned with the wiring ,from the coil, to the ignition cap distributor
does anyone knows where the problem come from?

56yblock · 01-12-2019, 12:09 PM

i post the pics

50fordcoupeman · 01-12-2019, 12:45 PM

I had one do that also. Never did figure out what happened. I replaced the coil and wires involved and it was still ok when I sold the car. Coils can be strange beasts!!

KULTULZ · 01-12-2019, 02:27 PM

What I am thinking (scary) is high secondary IGN resistance , either plug wires and/or plugs. Maybe need to perform a resistance test on the wires. What type of plug are you running? Points or PERTRONIX?

And then again it might just be a CHINESEIUM parts failure.

Rusty_S85 · 01-12-2019, 05:51 PM

I had that happen on my truck with a Duraspark II. Did it once so I don't know but it was with a set of 9mm Ford Racing plug wires and motorcraft copper plugs. I always wondered if it was just a defective coil wire.

dmsfrr · 01-12-2019, 06:05 PM

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I'm guessing the hi-voltage wire from the coil to the distributor was old or damaged and it's resistance was much too high, so the spark leaving the coil found an easier path to ground, across the top of the coil. Possibly to the "-" wire for the distributor?
.

KULTULZ · 01-12-2019, 06:07 PM

Quote:

I always wondered if it was just a defective coil wire.

Could have been a coil wire, cap or rotor and wires/plugs.

Rusty_S85 · 01-12-2019, 06:14 PM

Quote:

Originally Posted by KULTULZ

Could have been a coil wire, cap or rotor and wires/plugs.

Possible, but I changed just the wire out and it never did it again.

Wont be a problem for me when I put my new engine in, I got a new dist for the truck with a steel gear for a roller cam and I have a new NOS cap, cap adapter, and a motorcraft rotor to go on the new engine.

I just thought it odd that it just did it with no sign. It didn't burn it two on mine it just when I pulled the coil wire off it actually fell apart and was no good then. Think I was pulling the wire off to pull the coil to have a easier time pulling the valve cover.

56yblock · 01-13-2019, 06:35 AM

thanks for the answers ,i changed by the new one and now it start and runs good, maybe i'll must to change the points and the condenser?

56yblock · 01-13-2019, 08:09 AM

even with the burned coil the car to restart but there were small sparks + or - terminals, is it strange?

dmsfrr · 01-13-2019, 12:26 PM

Quote:

Originally Posted by 56yblock

even with the burned coil the car to restart but there were small sparks + or - terminals, is it strange?

Not strange at all. The burned / carbonized surface of the coil is now more conductive than it was, it's no longer an insulator.
You need a new coil, and all new spark plug wires, if the condition of the coil wire is any indication.
.

01-12-2019, 07:50 AM	#1
56yblock Senior Member Join Date: Nov 2016 Posts: 270	problem with coil hello guys i had a problem with my coil , she burned with the wiring ,from the coil, to the ignition cap distributor does anyone knows where the problem come from?

01-12-2019, 12:45 PM	#3
50fordcoupeman Senior Member Join Date: Mar 2016 Location: LaGrande Oregon Posts: 865	Re: problem with coil I had one do that also. Never did figure out what happened. I replaced the coil and wires involved and it was still ok when I sold the car. Coils can be strange beasts!!

01-12-2019, 02:27 PM	#4
KULTULZ Senior Member Join Date: Aug 2012 Location: IN A 'GALAXIE' FAR FAR AWAY Posts: 6,475	Re: problem with coil What I am thinking (scary) is high secondary IGN resistance , either plug wires and/or plugs. Maybe need to perform a resistance test on the wires. What type of plug are you running? Points or PERTRONIX? And then again it might just be a CHINESEIUM parts failure. __________________ *** - WHY IS IT ... - ... that everything you buy in the grocery store is either wrapped in or contained in plastic but the government doesn't want you to carry it out in a plastic bag? WONDERING IN W(BY GOD)V ... DIAGNOSED CDO** - (OCD In Correct Alphabetical Order)

01-12-2019, 05:51 PM	#5
Rusty_S85 Member Join Date: Dec 2018 Location: Houston, Tx Posts: 61	Re: problem with coil I had that happen on my truck with a Duraspark II. Did it once so I don't know but it was with a set of 9mm Ford Racing plug wires and motorcraft copper plugs. I always wondered if it was just a defective coil wire. __________________ '56 Ford Fairlane Town Sedan - 292 Y8 - Ford-O-Matic '78 Mercury Cougar XR7 - 351W - FMX '82 Ford F150 Flairside - 302 - C6

01-12-2019, 06:05 PM	#6
dmsfrr Senior Member Join Date: Aug 2012 Location: Abq, NM Posts: 3,607	Re: problem with coil Sponsored Links (Register now to hide all advertisements) I'm guessing the hi-voltage wire from the coil to the distributor was old or damaged and it's resistance was much too high, so the spark leaving the coil found an easier path to ground, across the top of the coil. Possibly to the "-" wire for the distributor? . Last edited by dmsfrr; 01-12-2019 at 10:14 PM.

01-13-2019, 06:35 AM	#9
56yblock Senior Member Join Date: Nov 2016 Posts: 270	Re: problem with coil thanks for the answers ,i changed by the new one and now it start and runs good, maybe i'll must to change the points and the condenser?

01-13-2019, 08:09 AM	#10
56yblock Senior Member Join Date: Nov 2016 Posts: 270	Re: problem with coil even with the burned coil the car to restart but there were small sparks + or - terminals, is it strange?