I'm getting a CEL which usually comes on around 50mph and then stays on. The car stumbles or bucks while I try to maintain a certain speed. It's really noticeable in 1st and is almost undetectable in 5th, at least the passengers don't seem to mind. If I wasn't so damn broke, I would take it to a shop that is susposedly great at diagnosing CEL's, and not just read the code and replace a part. I'm talking about Pat Goss, he has a weekly radio show that I listen to quite often.
http://www.patgosscarworld.com/carworld.htm I just got the car about 4 months ago and it has had this problem ever since. I replaced the plugs, wires, filters, PVC valve (that was insane) and O2 sensor. And I also cleaned out the mass airflow sensor with O2 sensor friendly carb cleaner. I haven't read the CEL code yet ('95 EEC-IV), I was hoping that my tune-up would of caught the problem. I'll read it this weekend and get back to you. Thanks for the interest.