It seems to be an issue for some with SRT-8s (same engine/ecu) Check out below, it's a 42 page thread, I didn't read through the whole thing but I expect it will provide some clarity for you. Unrelated but relevant, my friend was having a similar issue with a factory turbocharged Mazda. I found a TSB for him that was for updating the maps for the fuel pump, the dealership re-flashed his ecu with the latest software and it solved his problems.
Engine Stalling? - Dodge Challenger Forum: Challenger & SRT8 Forums