Hello HT, thanks again for your advice/recommendations. Since I started
this thread I've done some searching for answers on this spark plug
issue because I wanted to get the correct, recommended, replacement
plugs. Phoning my local Ford parts dealership gave me new Ford
Motorcraft part number, AGSF32FM, and searching the net gave me
information, and controversies, surrounding the replacement Fine-Wire
platinum plugs for the original single/double-platinum plugs.

Another weird thing about the replacement plugs is that the threads are
longer, which appears as if the plug will seat further into the
cylinder. Here is a site that notes the differences of the plugs:

http://www.v8sho.com/SHO/SparkPlugChanges.htm

In addition, I am going to price a set of Motorcraft wires and will most
likely change them at the same time too.

Steven

Happy Traveler wrote:
> The FM suffix appears to indicate platinum-plated center wire and
> nickel-plated outside electrode (i.e single plat -- which is fine for COP
> systems, but not for the older double-ended coil systems). Oh well, the last
> thing I wanted to start is yet another spark plug war. Perhaps someone in
> the know will enlighten us about those confusing Motorcraft/Ford
> designations.
>
>>> HT, after some more research I found out that the SP432 (AGSF32FM) are
>>> the correct NEW plugs recommended by Ford to replace the AWSF32EE. It
>>> seems the AGSF32FM (SP432) is a new Motorcraft Fine-Wire Platinum plug.
>
> By the way, I found a typo in my advice about wires. Meant to say:
> ".... Measuring resistance (as suggested by some manuals) is also futile,
> because it's typically NOT the center conductor that fails...."
>
>