My car will not start have tried everything he said it was a sencer but which

What is your question?

I put a radiator on it rode in it for 2 days went to the store and got in it and it turned over but didn't start have check everything he think it might be a center its not the fuel pump or alternator or batterry

What makes this problem better or worse?

It will not start have check everything he think it's the sencer

How long has your 2014 Mazda 2 had this problem?

2 days