P0343 Saturn -

Question

Car died going down the street replaced both crank and cam sensors had a 341 code to start now a 343 code now it back fires out the in take

Answer 1

P0343 Camshaft position sensor circuit high input

Back fire out through the intake, check the fuel pressure, when a engine is started cam and crank sensor are not synchronized , the fuel injector and ignition spark randomly occurs until the engine start there it  is then synchronized, check the fuel pressure , if that are is good , this engine has a timing belt that should be check for proper operation.