I searched and found this
Originally posted by chongo:
I thought I would post this incase any of you have this problem or for those that might get this problem.
Engine will misfire after it's sat warm. Either idling or stuck in traffic. Loss of power, engine may stall. Would run good (no misfires)if on highway or roads with little or no traffic. Misfires were on cylinder 2 & 3 no other codes.
I had been dealing with this issue for 10 months, not even Ford could figure it out. My two mechanics friends after months of fustration finally did last week.
Ford told me to stop using winter fuel and also said all my cats were bad, but wouldn't warranty them..... 
(I took it to Ford 3 times)
I had changed wires, plugs, ignition coil, PCM computer, cam & crank sensors, ECT sensor, DPFE sesor, fuel filter twice, cleaned UIM & LIM, etc........you get the idea.
It was finally solved as the fuel pump was bad . It didn't show on any fuel line pressure tests or obd2 scanner tests.
Idle psi was fine, hold psi fine...etc.
I did appear finally last week when we tested the fuel line pessure again (I can't remember how many times we've done this) and the pump was only priming 5psi on a warm engine. I took 5 priming cycles to get to 25 psi. Cold engine was fine.
Don't ask me how that's possible I have no idea.. 
We just got very lucky that this happened!!!
As I said it never appeared before during pressure tests. Changed pump car runs like new.
I hope this helps someone, so that they don't have to go through the same time frame where you can only drive your car for 10 minutes and then have to let it sit for 1 hour before you can drive it again. Quick hops to 3 stores was impossible.
Thanks to everyone that tried to help, but none of you figured it was the fuel pump either...... 
you guys think that might be it? Ive completely ran out of soloutions..
