1999 Windstar stalling

My wife's 1999 Windstar stalls at idle. Starts fine, runs fine otherwise, no trouble codes. Is idle speed adjustable? Any help/ideas? TIA

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.