Idle Adjustment

With engine at normal operating temperature, set idle RPM to 900±50 RPM. CO% level at this RPM should be 2.5±.5% on all engines. A second check of CO% level should be made at 2400 RPM. At this RPM 911T Models should have CO% level of 1.5-2.0% and 911E and 911S Models should have CO% level of 2.0-2.5%.