Windstar Emission Leak?

Got the service engine light on Brought it to a garage and they said that its an Emission Leak, but cannot find it. Is there any know spots to look for the leak in a 2002 Windstar LX.
What does an emission leak do to the van, Make it harder on Gas?, Still driving the van but don't notice any difference sence before the light came on.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
What the heck is an Emission Leak? There are lots of components in the Emission Controls. A garage should be more specific... which component of the system is leaking?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

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.