My girlfriends 98 taurus is in bad shape. It has no power coming off the light and four check engine codes relating to the EGR Valve. I am thinking more and more it could be a clogged cat! My question is how many cats are typically on a 98 taurus (not sure what v6 is in it)? I know a shop that will replace the cats with straight pipes if it nets no CEL lights. Thanks!