Subject: Date: 12/23/2004 Imagine my surprise when reading the problems of "Nancy of Corona, CA" with her 1998 Ford Expedition. I too have a 1998 Expedition that one of the spark plugs "blew" right out of the head! I have a 5.4 liter engine and it was a plug on the right side that blew. $2,400 later, it seems to be working fine. I have had no other problems with the vehicle.