*Probably* Idle Air Control. The 4.0 was also plagued with intake manifold
leaks that could reproduce the same symptoms.

A year and motor size may help and whether the problem goes away when the
car warms.

"karent" > wrote in message
lkaboutautos.com...
> My Explorer will only start when I give it gas and stalls out as soon as
> you take your foot off the gas. What is the problem?
>