[Andy Black]

Where can i get some coils for the GTS R33 Import and wiring to go with it?

Do i need to replace all 6 at once?

How can i test if one has gone funky?

 

[MattPayne]

clip a plug into a coil, rest the plug on the engine block so its nicely earthed and turn the key... plug should spark if the coil works.
this will only show if the coil works or not, not if the coil is a little iffy...

 

[Andy Black]

seems fair enough.