Cheers Danny, think the MAF is ok now, after cleaning it out and re-installing it hasn't come back up on Vag-Com and the van is running pretty good. Think I will change the Lambda tho, its still using a lot of fuel, I know the Van is a lot heavier than my VR and it has an extra 12 valves, but if I can get 50-55 miles from a tenner of fuel, then surely I should be able to get 35-40 from the van?!?!

What do you mk4 V6 boys/girls get mpg wise??
Just changed the coding on the Auto box for economy mode too, see if this makes a difference.