Hey i got an r33 GTS, non turbo of course and i had the miss-fire issue too but it was only on idle once the car had warmed up.
I did the tape fix to test if it was the source of the problem and it ran as smooth as a baby's arse.
Went to bunnings and did the silicone thing today and they'll be back in tomorrow after school.
Thanx and yet again SAU to the rescue for $10.