I have a CO meter on loan and wish to check and adjust the emissions, now hat I have car running reasonably well.

What is recommended procedure?

Does MPS get adjusted at some higher rpm?

Idle screw on ECU - is that just fine tuning after MPS is set?

Tried to find this on web, but my search skills must be lacking

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Graham
85 300D,72 350SL, 98 E320, Outback 2.5