Pontaic Bonneville

Im having problems with my 1996 pontaic i
don't know whats wrong i got everthing done
to this car oil change break lines manifold
gaskets wheels swag bars i just got it fix last
night this morning i get in the car turn the
key its crank then boom then shuts off tryed
it again it does the same what can it be i
spend all my money in tis car i had it about a
year now the car came from up north it was
snow rust but i replace everything with new
parts