If you read this earlier on a reply thread, I apologize, I just figured out how to start a thread.
This is what I'm working with:
2005 Chrysler Crossfire Convertible – (6 speed, 6 cyl)
Was working fine, bought it, drove several times, one morning, won’t start.
Cracks, fires, stalls. Did this three times. After three times, it will not crank again until battery is disconnected, then it repeats the problem. With foot on throttle, cranks, revs, stalls, cranks, revs, stalls, then no cranks. Disconnect battery, 3-5 minutes, problem repeats. When it does fire, it fires for 3 seconds.

Checked:
o key fob,
o battery
o RCM,
o changed cranked position sensor.
o No set codes.
o Only thing OBD said was ‘open circuit in fuel pressure regulator’.
o Security light is not on in dash
o no security errors showing in dash
o have fuel pressure
o all fuses in car are good
o everything else (electrc/power) functions properly.
o Car does communicate with OBD II tester I
o Checked all wiring harnesses, including mouse destruction.
o Giggled all connectors
o unplugged mass flow sensor
o checked cam sensor, SLIGHTLY changed how it fired.
My wife has pretty much been upset since this started over a month ago. We are at a loss and I am a good mechanic but I'm dumb-founded on this car. We did cave and buy the $200 shop manual.
PLEASE HELP. If someone gets me an answer that makes this thing work and therefore making me able to sleep at night because the nagging has stopped, I'll send you a gift card for a steak dinner!

Mark