Originally posted by vudusvt:
If it's only running like crap when it's hot, your 2ndaries may be stuck open. This doesn't always trigger a CEL, but if that's the problem, the code is in there somewhere....

Does it still run like crap at highway speeds/upper RPMs (> 4000)? Or just the low end? If so, that very well may be your problem. Nothing's really "wrong" with the 2ndaries, it's just that the control box (IMRC) is just *baking* there on top of the intake manifold. This has been known to lead to intermittent problems with the 2ndaries. It's happened to some of the San Diego guys, and (I just learned, thanks to Alex Peper) me too.



It runs like crap all threw the RPM range. We had the cats replaced a few months ago and originally they said all 3 were bad but when we got it back they only changed 2 and told us the other was fine.

The check engine light has come right back on no more then 2 days after we get it outta the shop. They keep telling us nothings wrong with it but cars dont smell like rotten eggs driving down the road when everythings fine with them. So we are probably gonna take it down to the ford shop and find out how much more $$$ we gotta drop into this POS...lol, never buy a car from Ugly Duckling.