heres the sich,a few weeks ago i started running lean at half throttle but idling i was running rich as hell ,like burning my eyes.i told all en and he said send a scan .just want too try tooo diagnose my self for now dont want too bother him unless i have too .anywayy when it was doing this every once and awile it would through a po171 po 174 .o2s,i have them disabled for my exhaust .but they are still throwing rear o2 codes ,not sure if this is supposed too happen or not?so this went on for a few weeks.now as of today its still going lean at half pedal ,but now its coding at idle at a red light ,it acts like its loading up but the gauge says lean.all the way.now i think i should get retuned for cold weather ,cause its getting below freezing up here in n.y. at night ,correct me if im wrong.but what im wonderiin is are theyre any other things i should be checking out .tnight im changing a front o2 and plugs ,if theyres any othr sugg. for me too check out wile im in the shop id appreciate it . thanks ahead.