Originally Posted by
Jan300
Voltage should be around 0.20 volt,but sometimes need adjusted little higher if not have stable idle.This is important when idle is lean like lamda around 1,like you should have with closed loop chip.Also plug gap is important.
I'll definitely give that a go - try to increase the closed voltage from 0.1 up to 0.2-0.3 or thereabouts. Will probably be the weekend now, as I don't have access to the car during the week (stored at my parents house at the moment, since my dad has a ramp and tools and stuff).