Thanx snake,that is exactly what is happening,but I had it pullied and retuned and it is still doing it.There was a recall on the tune on some 03's. Mine stalled if I got on it and got off the throttle quickly. I took it to Ford and got it recalibrated only to get it chipped and pullied later and retuned.
Well to tell the truth, this has been done many times.Have you recently installed any induction stuff like a MAF or CAI? Try disconnecting the battery to reset the computer..
When I bolted a CAI on mine the MAF counts were off and it stalled constantly, I simply reset the ECU and Boom, fixed!
I'd also Datalog your Fuel Rail pressure the see if that's an issue!