Car is STi 3 running link, exhaust and filter and no CATS. The following data was achieved at 84 degrees C.

Fast Idle 1 @2786 rpm CO 0.48% HC 58 ppm Lambda 1.03

Fast Idle 2 @2784 rpm CO 0.12% HC 43 ppm Lambda 1.15

Natural Idle @831 rpm CO 2.29%

Does this look about as expected comments most welcome.

 

What are the required MOT levels ?

 

Levels are Fast Idle 2450 - 3050 rpm
CO max of 0.30 HC max of 200

Natural Idle 750 to 1050 rpm
CO 0.50