I have a 95 EX wagon. When the engine is warm and I stop, after about 30 seconds of smooth idling it suddenly become rough. Every time, in Drive or Neutral. I stop, it's dead smooth, count to thirty, and suddenly it's like she's running on two cylinders. It's an immediate change, not gradual.

Everything else is good. Drives well, although mileage is pretty ordinary. About 22-25 mpg. Done 97,000 miles.

Any ideas guys?

 

Mine does the same crap, but I never thought to look in to that.