Hopefully you have been informed by now but if not the Focus had an unofficial recall where they didn't have to let you know but if you go in with to a dealership with the symptoms they are required to fix it.
I had a 2001 Focus that had the same problem and decided to look it up on the internet since mechanics were stumped. I found a couple sites with people with similar issues. My car stalled on the highway for me, it's very scary.
There are actually 4 things they were required to repair on my model completely free of charge.
Everything you describe is what happened to me. The thing that causes it to stall has to do with the fuel system it helps to keep a full tank if you haven't noticed that yet. I had my car for a year before I had any issues then it just kept getting worse.
Sunday, October 21st, 2007 AT 10:28 PM