I have a 2004 Ford expedition, that idles and runs fine, almost all the time. Now suddenly, with no warning it is stalling out. No noise, no shutter, just shuts downs as I am driving down the road. Sometime I can put it neutral while I am rolling, other times I have to come to a complete halt and wait a few secodns and recrank. Again, it works perfect once it recranks. This does not occur during a rainstorm or after a car wash. Any help to figure out where to start.