Bob Urz wrote:
> What is the convention on using die electric grease on spark plug
> wires? I have seen it in the plug boot ends. But what about on the coil
> wire between the distributor cap and coil?
> My taurus has been building up corrosion on the coil side of the wire
> to distributor wire. I am trying to determine if die electric grease
> is suitable here and if that may help the problem. The car has been
> kind of bucking and it seems like a ignition problem. Its got relatively
> fresh plugs and wires, and shows no visible arcing in the dark at night.
> But there was white corrosion on the coil when the would wire connects
> to the distributor
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Dielectric grease should be used on all of the boots on all of the wires.
It has been my experience that, most times, corrosion on the wire connections
indicates high resistance in the wire. This is usually caused by burning of the center
conductor just past the connection, often seen on lower price wire sets. I'll bet if
you pulled the boot off of the coil end of that wire, you would see the center
conductor burned out about 1/2" down the wire from the terminal.
I got burned by this on my own car once. 1986 Taurus 3.0L. I bought it with 6 month
old wires ACCEL wires(receipt in glovebox).The engine ran smooth but wouldn't get out
of it's own way. I went round and round with it while assuming the "newer" wires were
good. A friend stopped by and pulled the wires off of the cap, pulled off the boots,
and showed me the problem. The bad wires happened to be on 1 cylinder of each mated
pair, I think #s 1-3-5. The dist. cap towers on the 3 bad cylinders were corroded.
Inspection showed that the center conductors were burned on those 3 wires.
Since then, looking for corrosion on the cap and coil terminals has proven to be a
good indicator of failing plug wires. I see this a lot on aftermarket wires,much more
so than OEM or replacement Motorcraft wires.