I was told a securiry system that was installed previously is locked up my fuel stuff. Is that possible and how can i fix it

What is your question?

My van acts like it's gunna start and wont. It's not starter alternated or fuel pump. He's saying it's a security system preventing from starting. I got a new fob and it's working still won't start

What makes this problem better or worse?

Nothing

How long has your 2006 Nissan Quest had this problem?

2 weeks