noel,
assuming you have a fuel injected sl
I agree with naj, check your linkage set up first.
second, why do you think you need to adjust your co?
co% should be 3.5 - 4.5% at idle
and 4 - 6% at 1500 rpm.
first things first, let us know why
Matt
Austin Tx
66 230 sl - "white"
78 300 D - Blue
98 C230