Why my idle is rough???

What is your question?

My 2001Ford Ranger 2.3...idles rough...chokes and feels like it is going to stall...I am trying to fix this problem and what i have attemted has not worked..i have cleaned the mass air flow... cleaned the throttle body (used seafoam) and changed my spark plugs.... check for vacuum leaks best I could and still my car is running like crap..any body have some pointers...

What makes this problem better or worse?

Its worse when im in idle or backing up

How long has your 2001 Ford Ranger had this problem?

A week