The 1995 through 1997 Zetecs have an EGR valve. 1998+ uses the VCT system instead.
When I started getting codes on my 1996 Zetec indicating trouble with the EGR valve, I took the valve out and cleaned it up as well as I possibly could. This solved the problem for a few months, then it came back again. I figured that as much trouble as it was to get the valve out and back, I wasn't going to go through all that again just to clean the old one. Second time, I bought a new EGR valve, and installed it. That was several years ago, and I haven't had any trouble with it since then. I think I paid about $80 back then for the new EGR valve.
1996 Mystique GS, Zetec, ATX — Totaled in a collision on 26 Oct 2009
1997 Contour “Sport”, Duratec, ATX — Successor to the dead Mystique
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