I have a 2006 Expedition. I live in Wyoming and last August/September, our Expedition began stalling out while driving. Typically in situations like breaking for turning or coming to a stop. Usually it would start right back up. On occasion, the first restart attempt would fail, but would start on the second attempt. I first replaced the ignition switch, then a new throttle body with new IAC and TPS. No change. I then took it to the local Ford dealership which their first recommendation (I know the Ford Tech), was to replace the fuel pump which I agreed with. However, even after the fuel pump the problem persisted. After the fuel pump failed to remedy the issue, I spent time driving it (my wife typically drives it), to see if I could duplicate the stall out on command if you will. I would have the best luck getting it to stall when I would drive and somewhat hard break while turning to the left. 3 out of 5 times, I could get the truck to stall. Also, the engine would have to be at full operating temp. It spent the next 8 weeks at the dealership of who couldn't duplicate the issue. I even went in and drove with the Ford Tech. No stalling. I ended up taking it home the 2nd week of November and have been driving it every day since without any issues. Then, yesterday we hit upper 60's and low 70's for the first time this year and what do you know.....the issue is back. It's apparently affected by the outside air temperature. Has anyone experienced anything like this? What would be affected by the outside air temp??