klem kedidelhopper wrote in message
...
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