hey this morning i went to start my car after a cold night, it started fine i had it running for maybe 5-10 minutes then it just shut off. I am running msd 6al and was wondering what people think cuz it wont start again i have fuel but no spark

 

Battery voltage is too low to allow the MSD box to function. Charge the battery, or use a jump box. The other option is to hook up the stock ignition, which may have enough power left to fire.