Focaljet - Ford Focus Forums - View Single Post - Concerns with my header and lack of an O2 sensor

**QJKXBM** · 06-30-2008, 02:06 AM

you aren't running lean. the secondary and tertitiary o2 sensors you eliminated have only to do with emissions.

06-30-2008, 02:06 AM	#5
QJKXBM TEAM Member Join Date: Feb 2008 Posts: 116	Re: Concerns with my header and lack of an O2 sensor you aren't running lean. the secondary and tertitiary o2 sensors you eliminated have only to do with emissions.