The A/C belt broke now car will crank but not start?

I just got the car 4 days prior to this but up until the belt broke it ran perfectly. So, the belt broke at a red light, and the car shuts off. Tow it to a nearby parking lot, put the new belt on and go to start the car, it will turn over but won't start. It's getting fuel but won't fire. I bought both camshaft position sensors and the crankshaft position sensor. Still does the same thing. Check all the wires to make sure nothing got broken when the belt broke. The battery did shut off twice. Charged it up once and swapped it with a different battery but put the ther back in. Please, any ideas as to what else I can try? It's throwing a few codes all to do with the crankshaft. I'd have to get home and look to give exact ones.

Car listed above is a 328i E90 (3 series).