1) i know other cars i have owned the car could be shut off while driving, have not tried to attempt this with the crossfire. so it could have possibly happened.

2) the car does have a 7/70 powertrain warranty and this does sound somewhat like a engine issue (not exactly sure what the power train covers (ie. just mechanical or engine electronics). also since you are not that far over 36k they might make a good faith gesture and fix the car anyway.

as for the mileage that is up there, how long have you had the car? i'm at 25k and have had it 15 months, got it April 04'.

good luck with the problem.