Ford Windstar Engine Check Light
If you have narrowed down your problem to the egr system check the two
vacuum hoses that lead to the egr tube.
I found one of the tubes that connect to the vacuum broken off.
I went to ford and they wanted $116 for that piece.
I repaired it myself and the check engine light and I presume the reason it
was on are fixed.
If anyone finds they have that problem post here and i'll do my best to
explain the fix.