My 2000 lexus es300 wont start and i just replaced the IAC valveand mass sensor and put a new battery in and it wont even turn over wat can the problem ??

What is your question?

I replaced all the parts i put in and now it wont turn over at all its totally dead.

What makes this problem better or worse?

Worse after replacing parts

How long has your 2000 Lexus ES300 had this problem?

Little over a week.