[catvents]

Originally Posted by Searles Lewis

http://www.automotiveforums.com/t105...t_s_cause.html

Says wiswind already solved this for someone. Could Wiswind confirm the solution for me now?

What do I use to clean off the egr valve thoroughly? How do I know if it is clean enough? Pick and mineral spirits?

THe following link is included to the third subject of the Windstar forum
Code P171/174 update.....

It is a "bible" for whom who want to fix these code and ALSO the EGR port buildup cleaning. ( it is dry carbon that you have to remove (scratch out) without using any cleaning stuff. THe pictures on this link show you some big plans to clean that. Almost everybody here on this forum has followed this important informations for how to fix that EGR ports problems.
JUst follow these clear instructions

http://leckemby.net/windstar/windstar01.html