White plugs = severe lean condition. First step is to get a full set of Motorcraft double plats in there. Plugs should be light to medium brown in color with very few deposits.

One thing to mention, is your IMRC working properly???

http://www.bnmotorsports.com "And I will strike down upon thee with great vengeance and furious anger those who attempt to poison and destroy my CEG brothers. And you will know I am the Moderator when I lay my vengeance upon you."