Re: 04 taurus irregular idle
One of the lower cost 'potential' fixes is replacing the IAC or idle air control sensor located around the throttle body. It's fairly easy to replace with common tools, NAPA or another parts store it'll run for $30-40.
'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!