OK so after what i thought to be a successful piston installation i decided to finally start the car up......it ran, but 2 minutes later it died. And I started it again and long and behold 2 minutes later it died. Any thoughts to what the cause might be????? All help is greatly appreciated!!!!

 

does it make any noises? just shuts off? does it struggle to run when it shuts off or does it just die? any check engine lights? what are the rpms?