Just another observation. The spark plugs look as though they have
been operated at a very high temperature. The writing on the plug
which starts out blue, after operation have turned a rather rust
color, indicative of high temperature use. And the general color of
the metal of the spark plug that is visible has turned various
colors, also the look of high temperature operation.
Robert Dorr
At 01:44 PM 7/15/2012, you wrote:
Sorry for the double post and a correction, I said the part was Ford
Motorcraft Number SP-509, but it should be Ford Motorcraft Number SP-507.
Robert Dorr
