I've had my 2003 Audi A4 1.9TDi for nearly a year and been very pleased with it however on 3 occasions I've noticed odd behaviour. After approx half an hour of enthusiastic driving on A roads (i.e lots slowing for junctionas etc and then rapid acceleration) I seem to loose most of the power, acceleration is VERY sluggish. There are no warning lights or other symptoms. If I stop and re-start the car immediately the problem is gone. It's only happened on three occasions some months apart with plenty of similar driving in between
Any ideas as to the cause?
Mike