Get it on VAGCOM. Also, have a look at your MAF. See if the little sensor inside is split. If so that could also be your problem. I had it with mine, the AA changed all my relays and they couldnt work it out. Then i had it stuck on VAGCOM and it sourced the problem straight away. If it is the MAF soon you wont be able to move the car @ all. Theres a MAF for sale on the forum for £40 if thats any help. Otherwise GSF do them for about £95 and exchange. Good luck with it.