are you suppose to see any "light" spark around the coil? with the garage lights off i can see a small "spark light" around the coil and a small "light" on the porcelein part of the plug.

my car has been idleling a little rough lately. i changed the plugs and i just now changed the coil and i still see the "light" around the coil and plugs. its a msd coil and platnium plugs.

 

It's normal to see a little blue plasma, as long as there is no arcing and popping. The rough idle you are experiencing is probably due to a dirty IAC valve considering you have fresh plugs.

 

I would think that dielectric grease would help with the blue plasma look.

 

Glow is not harmful but arcing is.

 

The IAC? ignition...?
im going to put some elec grease on them.

the ICM is about 4 months old.