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From: klem kedidelhopper on 4 Jun 2010 07:27
I realize that there are other auto related groups to post this to but
with so many talented techs on this one I thought I give this a try as
well. My son bought a 2000 Lincoln. It has the familiar problem (I'm
told) of oil leaks around the ignition coils and then subsequent
failure of some of those coils. He plans to replace all the oil seals
associated with this but first we cleaned all the coils and I checked
them on the bench with an ohm meter and they all look the same. I
realize of course that this is not conclusive though. These read like
a standard three terminal auto transformer type of device, so can I
assume that they function basically like a standard ignition coil? Can
I apply 12V across the primary momentarily to induce the secondary
field? I have a motor driven interrupter of sorts that would
accomplish this. I read about a procedure on line apparently utilizing
special Ford test equipment, (WDC COP) and it shows oscilloscope
waveforms associated with the coils firing during test. It doesn't
show a procedure or connection diagrams though. I contacted the
manufacturer of the test equipment, Teradyne, but all they would tell
me is that it is Ford test equipment and that the equipment as well as
the procedures are proprietary. I would like to perform a similar test
using my own scope. Has anyone done anything like this? I would
imagine that you could use an inductive pickup similar to the type
found on a timing light placed around the secondary lead. I could wind
a coil if need be. Does anyone know if this would be a viable
procedure, and if so the details of the coil? Thanks, Lenny
From: N_Cook on 4 Jun 2010 07:44
klem kedidelhopper <captainvideo462009(a)gmail.com> wrote in message
news:f850118a-ec55-486f-9019-9b6efb195340(a)u26g2000yqu.googlegroups.com...
> I realize that there are other auto related groups to post this to but
> with so many talented techs on this one I thought I give this a try as
> well. My son bought a 2000 Lincoln. It has the familiar problem (I'm
> told) of oil leaks around the ignition coils and then subsequent
> failure of some of those coils. He plans to replace all the oil seals
> associated with this but first we cleaned all the coils and I checked
> them on the bench with an ohm meter and they all look the same. I
> realize of course that this is not conclusive though. These read like
> a standard three terminal auto transformer type of device, so can I
> assume that they function basically like a standard ignition coil? Can
> I apply 12V across the primary momentarily to induce the secondary
> field? I have a motor driven interrupter of sorts that would
> accomplish this. I read about a procedure on line apparently utilizing
> special Ford test equipment, (WDC COP) and it shows oscilloscope
> waveforms associated with the coils firing during test. It doesn't
> show a procedure or connection diagrams though. I contacted the
> manufacturer of the test equipment, Teradyne, but all they would tell
> me is that it is Ford test equipment and that the equipment as well as
> the procedures are proprietary. I would like to perform a similar test
> using my own scope. Has anyone done anything like this? I would
> imagine that you could use an inductive pickup similar to the type
> found on a timing light placed around the secondary lead. I could wind
> a coil if need be. Does anyone know if this would be a viable
> procedure, and if so the details of the coil? Thanks, Lenny


I would have though the usual fault was interlayer discharge within the HV
windings. You can do a simple comparative test with just a neon and 100 Meg
of resistance dropper. Strongest orange discharge glow ok , poor or non
existant glow , bad


From: tm on 4 Jun 2010 09:39

"Jim Yanik" <jyanik(a)abuse.gov> wrote in message
news:Xns9D8D5EC988853jyaniklocalnetcom(a)216.168.3.44...
> "N_Cook" <diverse(a)tcp.co.uk> wrote in
> news:huaoud$pqq$1(a)news.eternal-september.org:
>
>> klem kedidelhopper <captainvideo462009(a)gmail.com> wrote in message
>> news:f850118a-ec55-486f-9019-9b6efb195340(a)u26g2000yqu.googlegroups.com.
>> ..
>>> like this? I would imagine that you could use an inductive pickup
>>> similar to the type found on a timing light placed around the
>>> secondary lead. I could wind a coil if need be. Does anyone know if
>>> this would be a viable procedure, and if so the details of the coil?
>>> Thanks, Lenny
>>
>>
>> I would have though the usual fault was interlayer discharge within
>> the HV windings. You can do a simple comparative test with just a neon
>> and 100 Meg of resistance dropper. Strongest orange discharge glow ok
>> , poor or non existant glow , bad
>>
>>
>>
>
> I would think that oil would be an insulator.
> It's probably defective coil construction or problem with the plastic
> potting,like cracks admitting moisture.
> Maybe aftermarket coils would last longer.
>
>

The easiest thing to do is swap the coils and see if the problem moves
with the coil. I agree with Jim, it is most likely a potting problem and
an aftermarket coil will resolve it.

Tom




From: Bruce Esquibel on 5 Jun 2010 09:08
klem kedidelhopper <captainvideo462009(a)gmail.com> wrote:
> I realize that there are other auto related groups to post this to but
> with so many talented techs on this one I thought I give this a try as
> well. My son bought a 2000 Lincoln. It has the familiar problem (I'm
> told) of oil leaks around the ignition coils and then subsequent
> failure of some of those coils. He plans to replace all the oil seals
> associated with this but first we cleaned all the coils and I checked
> them on the bench with an ohm meter and they all look the same. I
> realize of course that this is not conclusive though. These read like
> a standard three terminal auto transformer type of device, so can I
> assume that they function basically like a standard ignition coil? Can
> I apply 12V across the primary momentarily to induce the secondary
> field? I have a motor driven interrupter of sorts that would

You kind of are over thinking this.

I have a 97 Lincoln with the coil-on-plugs, with the associated ocassional
oil leak, but you are better off getting a OBD2 tester and let the onboard
computer tell you the bad ones.

It'll spit back the exact "cylinder misfire on ...".

Off hand, failure of them I don't think is related to the oil problem. I've
had two of those coils fail so far and the last one was dry as a bone even
though it was drivers side closest to the firewall and the 1st plug closest
to the radiator was completely submerged, that one was fine.

I just sop out the oil with twisted paper towels every once in a while (2 or
3 years) and just keep on going.

Unless you are topping out the oil every time you fill up, it's probably not
worth bothering to fix, if it can be fixed at all. I've seen guys say they
went through the trouble of replacing the valve cover gaskets with the
problem returning in 6 months or so.

Seems to me like it's a few drops a month which eventually fills up the
chamber the plug sits in, but like I said, once in a while just sop out the
excess with a twisted paper towel and it'll be fine.

The replacement made-in-china coils are only around $30 anyway.

Also if you haven't stumbled into it, try this site:

http://www.markviii.org

Although it's for Mark VIII owners (which was stopped in 1998), there are
quite a few discussions about this matter on there that might be helpful.

-bruce
bje(a)ripco.com

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