engine swap troble 97 into a 96 help plz help

i have a 96 sunfire and some one tried to put a 97 engine in the car. now the car will start and then die. head u can only put a 96 engine in a 96? any help on what to do?

The 1997 and 1996 do interchange,has to have the cam sensor which they both have.Do the simplest checks including checking for spark.

So what do i need to do?

Theft light flashing when it dies?

yea. so what does that mean?