What will cause my 2006 Ford Freestar 4.2 van to crank normally but wont start?

What is your question?

My van was running bad missing and going on so I changed spark plugs and the fuel filter. After this it runs fine . It's just when I go out of the morning to start it . It cranks normally but it will not start.Aftet trying a few times it does and then runs fine.

What makes this problem better or worse?

This is how it acts when it's cold. But when warmed up it starts fine.

How long has your 2006 Ford Freestar had this problem?

A few days