Has anyone else had problems with the Motorcraft 8mm plug wires? Is it normal for the Motorcraft 8mm wires to wear out after about 6 months? I just want to know because the wire for #5 cyl is arcing with anything close to it including the head, alternator housing, and other wires. I bought the set in early spring, 2004 so it is a relatively new set and is going to be replaced by Advanced Auto under warrantee. I am just wondering if I got a bad set or if this is common with the Motorcraft 8mm sets and I should get something different like the FRPP set.