car wont start

[viperbenz1]

so to, day i was driving my car for about a hour, when i stoped at the store to get something i left the car running with my lil bro in it,when i got back it was off, i tryed to start it up it wont, also the check engine light light dont show on the dash when i turn the key,,, any ideas that can help
thanks everyone

 

[viperbenz1]

so this morning i took the car to my shop to see why it wont start, we found out that its not letting the fuel get to the motor and no spark , so we changed crank shaft sensor and still wont start, also in the passed 3 week if i hit a speed bump or something down the road, my check engine light will come on and go away after 5sec , and now when i put the key in the ignition and turn it check engine light wont even show nomore, please help me im lost,,,,,