Originally posted by Aussie SVT:
It has nothing to do with cam control, although by coincedence the Zetec does have a variable exhaust cam.
Oh, but only on 98+ Contours and ZX2's, and it's only used for emissions purposed. 95 - 97 Contours and Foci don't have the VCT (except, as noted, on the SVT Focus where the VCT on the intake side is used to make power).