My 2011 Kia Optima will crank but wont start. What could be the cause? Tried a new battery and no luck.

What is your question?

My 2011 Kia Optima won't start, before we have been able to jump it. Now it just cranks and won't start.

What makes this problem better or worse?

Hooking up to a battery pack lets it act like it's going to start, but never does

How long has your 2011 Kia Optima had this problem?

2 days