gyates
Active Member
Looking for ideas. My '05 St has 73k miles. I am having issues on "cold start-up", even with the ambient temp at 109. BTW ambient temp does not matter on this issue I am having. I get teh same result whether it is 109 or 70 outside. Bascially when I first start the truck it is idling very low, in 500-600 range. there is no idle "surge", it just idles low immediately. If I hit the throttle gently it will then immediately idle up to 1200-1300 range, then slowly settles at 750 after initial warm-up for the duration of the drive. Idle otherwise is perfect!! Recent repairs include cleaning the MAF sensor, IAC replaced about 6 months ago (Motorcraft unit), and this week the fuel inertia was replaced (had a no start issue adn switch owuld not reset). Fuel filter is also new. Fuel pump replaced about 2 years ago with a Motorcraft unit. No CEL illuminates. I am at a loss on this one!! I am not a mechanic but I am not afraid to do minor repairs like replacing the IAC or cleaning the MAF (already done). ANy ideas apprecaited!!