Re: running to lean
I'd advise replacing both O2 sensors. if the forward one goes, the rear will follow shortly. It's just a rule of thumb.
If replacing the O2 sensors don't help you, I'd take it to a good shop and get a proper diagnosis. Be sure that ALL wiring is tight going to the PCM under the hood. Loose connections can cause a stir of problems.
'00 Durango R/T 360ci 290hp (modded); 138,500m
'06 Pontiac G6 GT 3.5L 220hp; 44,000m
'12 Chrysler 200 Limited 3.6L 283hp; 13,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!