stalling problems
 

Hey guys,
So about a month ago I had problems trying to shift into gears. The engine would stall when I shift into D or R even when givin it some gas. So I found out through the web site that is was the IAC valve and replaced it. NOW a month later its doing it all over with a new valve installed!! I have a 2002 250 4x4 auto v-10 140,000. Any Ideas???? Thanks