Originally Posted by mercmark

Hi Stu,
Yes tried all that, screwed the CO potentiometer screw in as far as I could get away with before the test, although am I right in thinking that the screw only alters the CO content by a relatively small amount anyway? I need to reduce the CO by 1.2%'ish

Car was fully warmed up at MOT, gave it a good thrashing before I took it in, and the emmissions test was done immediately.

Mark.