In the FAX section, find the instructions on changing the fuel pump on returnless systems. Find the very last photo on the page and click on it and study the disc shapped filter on the bottom of the fuel pump module.
Follow the instructions and remove the pump. Remove that filter and throw it as far as you can and put the car back together without the filter. You don't need it, there is a conventional sock filter further inside the pump module.
Actually, before you put it back together, confirm that the fuel tank is clean (no evidence of massive contamination).
The disc filter is too small or too fine or both. Ford recalled some Cougars and Foci (Focuses?) for the same problem but didn't see fit to go back and include the returnless fuel system Contours.
http://www.contour.org/mods/mods.php?s=howto&displayid=39 
