Had a P0304 (misfire #4 cyl.) on my 98 F-150 5.4. Got a COP from Autozone and when to replace it. When I when to install it (using silicone dielectic compond on boot end) it didn't seem to sit in the location correctly so I pulled it back out only to find the boot stuck on the plug. I have tried everything I can think of to get it to release from the plug. Please I need some ideas how to get it out of there. Thanks, Dana.

 

Never mind. I used a small round rod and put it between the boot and spark plug and ran it around the curcumference. It helped release the boot and all is well.

 

Usually, you can grab hold of the boot with a long pair of angled needle nose pliers and spin it a half turn or so. The boot should break loose after turning a little. Pulling the coils with a little heat in the engine seems to make 'em easier to remove from the plug wells in one piece as well.