I just wanted to say a general thanks to those who are contributing help to this site. I did not have to post a thread for my problem, but I found a lot of threads already covering the problem.

My 1997 Expedition had the check engine light on. I followed advice given on these boards, and $21 later, I replaced the PCV assembly (boot wore out) and the car is back to tip top shape.

Thanks to all. This site makes me consider buying another ford truck if my second car fails.

Thanks. Sean.