If it has a GTEC fitted then I will be getting rid off it. My only solution I can think off would be to reset the ECU, have over a half tank of petrol and give it a good run over 60 miles on the motorway" and also to go on some back roads to adjust speeds.
Had see someone mention on here that the GTEC 1 was meant to run on 95ron?
It seems very strange that having done a ECU reset 2 weeks ago and giving it a run it was fine for a good 10 days and when I put in super unleaded it went back to the erractic idling!!. At first I thought I cured the problem due to thinking it was the Fuel pressure regulator hose, however I suspect it wasnt that after all.
Anyway the next solution will be for me to check to see if it has a GTEC or something similar fitted this weekend, and then do a ECU reset and have over a half tank of petrol and give it a good run on the motorway and go on some back roads