Right, still got a rough idle. No fault codes other than an intermittent 17705. Also noticing the revs drop down, with lights dimming etc like its gunna stall when coming to a stop (indicates a vacuum leak perhaps?) and a flat spot sometimes when pulling away from a junction etc.
After changing out most of the ignition side of things:
sparks
coil packs
coil pack wiring
MAF
N75
N249I've decided tomorrow to:
clean and re-adapt the throttle body (again)
fit a new temp sender
look for a possible vacuum leak under the manifold (PCV etc did have crap all over it before I wiped it off recently)
Any handy pointers on the last item on my list? ie spray some carb cleaner around a bit etc... ?