[euro_zx5]

That sounds like what my 05 was doing, except it would have a single hickup on the highway, and it only did it twice in a 2.5 month period. I was considering the fuel pump as the culprit, but never got around to bothering with it as the issues were few and far between. If your car was sputtering for a half an hour, i'd get that diagnosed asap John.