Wish i had of read this earleir i am having the exact same problems apart from i am not running coil packs.

So far i have changed.

Cap and rotor arm.
Tryed different spark plugs.
Thanks to loader a different coil.
Brand new phase sensor.

Also my rev counter only works some times but i have a missfire even when its not working. But when it does work it jumps all over the place.

Oh and Adam send me ya number bud could do with a ctach up at some point.