Changing CDI packs

[HSVenforcer]

gday all,
Just wondering what is involved in changing the cdi packs for a VZ alloytec (172). Google isnt much help tonight.

cheers
steve

EDIT:
just speaking to a mate who is somewhat more mechanically minded than me and he does not seem to think it is and was also told they are referred to as ignition packs and not CDI's. So long story short. About 18months ago got misfire issues and the holden dealer got the code P0303 out of it. Packs were swapped around and i was told if i get P0304 then its the pack and to swap it out. Been getting some small misfires when using low amounts of throttle on inclines in the last 2 months. Today i finally got "check powertrain" and it was running like crap. No code was recorded. Restarting car seemed to solve the problem. I was able to replicate the problem when i put the foot down to overtake. Again got the warning and no code. After replicating 3 more times i got P0300 and P0304. So based on that i assume it is the ignition pack and am considering replacing them all.

[heyitsEnricoPallazzo]

Coil on plug (COP) and spark plug removal.

Do a search in this section using the word 'coil'.

[HSVenforcer]

thankyou thankyou thankyou ur a ledgend. very much appreciated