Hi Energy69, the exact same thing happened to my '98 manual GR. A mate of mine who is a genius with cars sorted my problem by simply removing the ECU and put it in the freezer overnight. Replaced it the next morning, car runs like a dream no more idling problem . I've had my pride & joy just over a year now and I've put up 16,000 miles of very happy motoring. The cat converter and the idling issue are the only problems I've had, I wouldn't change it for the world (well maybe for my own little island in the Caribbean )