I'm sure this is a stupid question, but how tight are the COPs suppose to be on the spark plugs. I was messing around under the hood yesterday and noticed that mine felt loose. I can move them quite a bit. Is there any way to tighten them? Thanks for the help.

 

The coil is weakly spring loaded inside the boot to plug area.
The single hold down bolt is only to keep them in place and is only to be just nugged down so the bolt does not break, strip or crack the coil mounting eye.
The hole metal eye insert is not a ground connection.
This single bolt will never hold them absoultely firm as a single mounting so it's not an issue.