This car is doing my nut in !!
Basically i have an s14a it had high like 3-4 k erratic idle the things i have dont to try sort this are
- adjust tos sensor witch is now correct
- check for boost leaks re new and tighten all clamps
- full service
- fresh full (emptied tank)
-- checked all earths and cleaned
- new o2 sensor
- cleaned afm
- checked fuses
- checked intake

I have wond the idle screw on the iacv all the way in this has brought the revs down a tiny bit , i have had to adjust the bolt under the throttle body i think it has the wax valve in it i would this all the way in and got idle to 1200 since doing all this i plugged in my ecu talk cable and the 02 sensor seems all over the place apparently this is normal , also the timing has adjust itself to 30. Degrees heres a video to see if anyone can help
http://sendvid.com/lsga6ssi