Re: Need help with my my 2005 focus zx3
One sensor can sometimes affect another. I'd replace the IAC & TPS sensors. They're easy to do on your own. I'd get the vehicle scanned first to make sure there aren't any engine codes stored. The lean problem might be due to a faulty oxygen sensor. The oxygen sensors keep the air to fuel ratio at the proper 14.7:1 for best performance. Just a caution here, replace both sensors, not just one. Why you ask? Because the new sensor will generally cause the downstream to go bad and give false readings. It might not happen right away, but give it a few months.
'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!