Well, the story with my friend's fierbird is going on. Emission test failed. To much CO and CxHx. CxHx problem solved immediatly replacing 2 spark plugs, but CO is out of norma.

COde 13 - O2 sensor reads lean, but this is new oxy sensor! replaced 2 weeks ago!!!!

Well, may by the sensor is from other car???? WHat Oxy sensor number I need to find? (Engine 3.1 V6, MT5).

The other quation - idle speed is 900 RPM, I used to drive Lumina and idle speed was 680 RPM. Is it normal?