Yeah, there's twin AVCS, doh, off course.
Changed one (pasenger side UK) and made a hell of an improvement. Engine Warning light now out. Drives so much better but........not perfect, suffers from kangaroo petrol a low load/revs.
Removed the 'dud' valve, ultrasonic cleaned it, it was a bit sticky. Put it in to the drivers side and immediately was **** again. Replaced the orginal in that side.Think i'll need to buy another one to get totally sorted. Gave up wasting time on the 'bay and got genuine from local delear