My wifes A3 1.8t sport quattro ARY engine turns over but will not start. I've ran VAG-COM and there are no fault codes in engine or immobilizer. She has been driving it round with no problems till tonight and hasn't put fuel in for a few days so it can't be the old diesel slip up. I've had a look round the engine and it all looks in place with nothing obvious, the is a very small split in the Y shape oil breather pipe coming out of the rocker cover to the PCV but this shouldn't make a difference. Any ideas?