i have 2006 A6 2.0tdi. keeps cutting out to low revs. eng management comes on .then it will go ok for while. egr intermittent fault coming up. i disconnected air flow and it seems to go ok.could airflow be at fault or do i need to take of egr and clean out.if so where is it.tr. tried new airflow made no difference. if i remove plug from airflow it will go ok.
