Been too busy with work lately and didnt have time to reply. The problem has not been solved yet, still cant identify the real cause. It happens once a while now. Esp if I drive off without warming the car for a min or so. It only happens after a cold start and once the loop closes, it doenst happen. Jack also thinks it could be the problem with DME. Going ther tmrw to service my car and lets see if there is a solution...