bcguthrie
New Member
- Joined
- January 26, 2010
- Messages
- 8
- Reaction score
- 0
- City, State
- San Diego, CA
- Year, Model & Trim Level
- 99 Explorer XLT
Need some help really bad. My check engine light has come on and hooked up my ODBII to it. I get the codes 0171 and 0174. I changed my two front O2 sensors and cleaned the MAF sensor and changed my air filter but am still getting the codes. I have been trying to get it smogged. The first time I had it smogged my CO % was 1.23 at 2500 rpm (which falied me) and was told I had a misfire and that was causing it. I changed the plugs/wires and solinoid (spelling) and had it retested my HC (PPM) skyrocketed from 8 (ppm)to 1852 (ppm) at idle and my CO% jumped to 9.08 at idle. Can someone please give me some guidance.