6. One thing you will notice while removing the old coil packs is that some of them may want to separate. Don't fret; this is normal. The coil packs used on your Ford engine are a three piece design with a coil, electrode wire, and a boot. After many miles of use the rubber boot that seals the plug hole can wedge its self in causing the pack to come apart when you pull it out. If this happens simply take it out one piece at a time and reassemble them once they are out, you didn't hurt anything.